DK2778089T3

DK2778089T3 - Stackable cup

Info

Publication number: DK2778089T3
Application number: DK14159809.4T
Authority: DK
Inventors: Gregor Efes; Hendrik Kremer
Original assignee: Cup Concept Mehrwegsysteme GmbH
Priority date: 2013-03-14
Filing date: 2014-03-14
Publication date: 2016-11-07
Also published as: EP2778089A1; ES2597241T3; DE102014103499A1; EP2778089B1

Description

DESCRIPTION

The invention relates to a stackable cup made from plastic with a cup body open to the top forming a receptacle and exhibiting a base and a cup wall and the other features of the preamble of claim 1 that are known from US 5 219 419.

Such cups consist of one piece and are manufactured for example in an injection moulding process or an extrusion process. The cups can serve as disposable or reusable cups. To enable stacking, the cup body tapers downwards. The cup body exhibits a cup wall, a cup opening and a base. The cup wail spreads a truncated cone. The base area of the truncated cone is open and coincides with the cup opening. The base is located in the area of the surface area of the truncated cone that the cup wall spreads. The cup is also equipped with a handle. The handle is designed in order to enable a plurality of cups to be stacked. US 5 219 419 A discloses such a cup having a cup body in the form of a truncated cone and a handle having a conically shaped grip piece that extends in the direction of the cup base. When being stacked the cup bodies and the grip pieces of a plurality of cups fit inside one another.

Such cups are used to dispense beverages at major events such as football matches or concerts. However, it is not possible to prevent cups filled with liquid from intendedly or unintendedly falling down or being actively thrown. If a person is hit by such a cup, injuries can be caused. If there is no liquid in a cup, the danger of injury is low due to the relatively low dead weight of the cup. If a cup is filled with liquid, however, the danger of injury is significantly higher due to the greater weight force of the cup filled with liquid. DE 34 22 441 A1 discloses a drinking vessel whose body exhibits overall an inclination towards the vertical and, on the base, exhibits a partition wail, running obliquely in the direction of the said inclination, that leads to a unilateral displacement of the centre of gravity when the drinking vessel is full.

The object of the invention is to provide a cup with which the danger of injuries in the event of the cup filled with liquid being thrown or free falling is reduced.

This object is achieved by a cup having the features of claim 1. The cup is characterised in that it exhibits a specially shaped base which ensures that the centre of gravity when the cup is being filled is offset in the diametrically opposite direction to the handle. The handle exhibits a grip piece and a handle connecting piece that connects the grip piece with the cup body and protrudes outwards. This handle connecting piece exhibits an essentially continuous surface that is airtight. The continuous surface is preferably oriented essentially parallel to the base area of the truncated cone that the cup wall spreads. The handle connecting piece preferably runs horizontally if the cup is placed on an essentially likewise horizontally aligned surface.

The profile of the handle connecting piece ensures that a higher air resistance acts on the handle connecting piece in an air stream in free flight or free fall. This air resistance is higher than the air resistance acting on the diametrically opposite side of the cup, thereby generating a torque acting on the cup. This torque favours a rotation of the cup in the air, which results in the cup opening pointing to the side and the handle pointing upwards. Advantageously the cup stabilises in this orientation in flight. This orientation in turn enables the emptying of the cup in free flight or free fall. Furthermore, in flight the cup is decelerated more strongly by the air resistance acting on the handle connecting piece than a liquid contained in the cup. This effect also enables the emptying of the cup in the air, thereby sharply reducing the mass and kinetic energy. This effect occurs in addition to a torque that is effected by the specially shaped base. The two effects are cumulative.

Advantageously the continuous surface is part of the surface of a web of the handle connecting piece.

The stabilisation of the alignment of the cup with the cup opening pointing to the side and the handle pointing upwards further has the effect that the cup hits an object or a person with that part of the cup wall that faces away from the handle. This part is normally rounded, exhibits a large radius due to the round form of the cup body and is flexible due to the material of the cup. This additionally allows injuries to be avoided.

The base exhibits a first base element and a second base element. With the first base element the cup is placed on a surface. The second base element is formed so that as the cup is being filled it effects an offset of the centre of gravity of the at least partly filled cup in a direction away from the grip piece. To that end the second base element has a plurality of different levels that are above the level or levels of the first base element when the cup is standing on an essentially horizontally aligned surface. Due to the different levels of the first and second base elements the centre of gravity of the at least partly filled cup is offset away from the longitudinal axis and in the diametrically opposite direction to the grip piece. The longitudinal axis of the cup is a straight line that runs through the centre of gravity of the empty cup in a vertical direction when the cup is standing on an essentially horizontal surface.

The base is formed with its two base elements so that it exhibits at least two different levels when the cup is standing on an essentially horizontally aligned surface. These result in the centre of gravity of the at least partly filled cup being at a greater distance from the grip piece of the handle than is the case with another cup that coincides in all features except that the base is fiat and parallel to the surface area of the truncated cone that the cup wall spreads, the distance between the centre of gravity and the grip piece being the shortest connection between the centre of gravity and the grip piece.

So that the second base element exhibits a plurality of levels that are different from the level of the first base element, it can for example take the form of an inclined plane or exhibit a curve or at least one step.

The different levels of the base ensure that the weight force of a cup filled with liquid is greater on one side of the cup than on the diametrically opposite side closer to the grip piece due to the column of liquid arranged above the base. If the cup is filled up to a certain level, the column of liquid above the lowest level of the base is higher than above the highest level of the base. The higher the column of liquid is at a particular place, the greater is the associated weight force. If the cup body is symmetrical, the lowest level of the base and the highest level of the base is located outside or away from the centre of the cup body defined by symmetry.

The differing weight force that acts on the various sides of the cup when the cup is aligned with the cup opening pointing upwards results in the cup turning or tilting in free flight or free fall such that the opening of the cup body points to the side or downwards. Since the air resistance causes the cup to be decelerated more strongly in the area of the handle connecting piece than the liquid contained in the cup, the liquid flows out of the cup during the flight phase. The cup is thereby emptied fully. The empty cup exhibits a significantly lower weight than a cup filled with liquid. The reduction in mass also causes a sharp reduction in the kinetic energy in the flight or fail with the result that the danger of injuries in the event that a cup according to the invention is thrown or falls freely is considerably reduced.

The effects that the form of the base and the handle have on an at least partly filled cup in free fall or flight are cumulative.

Since the second base element exhibits at least two different levels, it is not suitable as a stand surface for the cup. To enable the cup to be deposited reliably and without the danger of tipping over, the cup is equipped with the first base element, which projects downwards at least partly beyond the second base element. The first base element forms a stand area or individual stand segments with which the cup can be set down on a surface such as a table or counter. The stand area or the stand segments have a uniform level. They define a plane that is parallel to the surface area of the truncated cone that the cup wall spreads. The surface area can also run in this plane. If the base area and the surface area of the truncated cone are parallel, the distance between the top edge of the cup body and the stand area or the stand segments of the first base element is the same everywhere, so that if a cup is deposited on an essentially horizontal surface the cup opening of the cup body is aligned vertically upwards.

The greater the difference in height is between a highest level and a lowest level of the base, the greater are the differences of the weight force of the column of liquid located above the lowest level of the base and the column of liquid located above the highest level of the base when the cup is full. The greater this distance is, the faster a cup filled with liquid turns in free flight or free fall. It should be noted that the offset of the centre of gravity increases the danger that the cup deposited on a surface will tip over.

The information in respect of the lowest and the highest level of the base relates to the alignment of a cup that is standing on a surface running essentially horizontally.

According to an advantageous embodiment of the invention, the truncated cone that the cup wail spreads is symmetrical with two planes perpendicular to each other. In this case the base area of the truncated cone can for example be an ellipse. Preferably the two planes are aligned vertically when a cup is standing on an essentially horizontally surface. Advantageously one of the two planes runs through the handle.

According to a further advantageous embodiment of the invention, the centre of gravity of the at ieast partly filled cup is away from the straight line along which the two planes intersect perpendicularly,

According to a further advantageous embodiment of the invention, the truncated cone that the cup wall spreads is rotationally symmetrical around an axis of symmetry. This is a special case of a truncated cone symmetrical with two planes perpendicular to each other.

According to the invention the centre of gravity of the cup filled at least partly with a liquid is offset to the longitudinal axis of the cup body in the diametrically opposite direction to the grip piece and offset to the axis of symmetry in the diametrically opposite direction to the grip piece. The highest level of the second base element is located closer to the grip piece than the lowest level of the second base element. The lowest and the highest level of the second base element are located away from the axis of symmetry of the cup body. The longitudinal axis of the cup, which runs through the centre of gravity of the empty cup, is parallel to the axis of symmetry of the rotationally symmetrical cup body. The axis of symmetry defines the centre of the cup body. The second base element is not symmetrical with this axis of symmetry.

According to a further advantageous embodiment of the invention, the second base element at least in part takes the form of an inclined plane. The plane is inclined relative to the surface of the truncated cone that the cup wall spreads. The plane is also inclined relative to a horizontal surface on which the cup is placed. The second base element of a cup placed on a surface is thereby tilted against the horizontal. This means that the angle between the oblique second base element or oblique part of the second base element and the horizontals is greater than 0° and less than 90°. An angle of between 5° and 45° is especially preferable.

According to a further advantageous embodiment of the invention, the second base element is curved inwards or outwards. If the cup body is symmetrical, the mid-point of the curve is preferably away from the lines of intersection of the intersecting planes of symmetry or away from the axes of symmetry of the cup body.

In a variant not according to the invention the second base element has a flat form and exhibits only one level. It thereby defines a plane parallel to the surface of the truncated cone that the cup wall spreads. The distance from the second base element to a part of the cup wall facing the grip piece is less than the distance to a part of the cup wall facing away from the grip piece.

According to the invention the second base element exhibits a highest level and a lowest level when the cup is standing on a surface aligned essentially horizontally. The base can further exhibit at least one step between the first level and the second level.

In another variant not according to the invention the lowest level of the second base element is located adjacent to the cup wall and near the grip piece. The highest level of the base element is located diametrically opposite and likewise adjacent to the cup wall on that side of the cup body facing away from the grip piece. The lowest and the highest level of the base thus exhibit the greatest possible distance from one another. This favours the distribution of the weight force of a full cup and hence the turning of the full cup in free flight or free fall.

According to a further advantageous embodiment of the invention, the first base element is rounded. It thus has the advantage that the danger of injury from sharp edged webs is considerably reduced.

According to a further advantageous embodiment of the invention, the first base element forms a continuous ring or a plurality of ring segments on the underside of the cup body. If the cup body is rotationally symmetrical relative to an axis of symmetry, the continuous ring is or the ring segments are arranged coaxially to the longitudinal axis of the cup body.

According to a further advantageous embodiment of the invention, the cup wall in the extension passes downwards into the first base element.

According to a further advantageous embodiment of the invention, the first base section is fluted and open towards the inside of the cup body. The first base section is hollow inside and the cavity is open towards the inside of the cup body. This favours in particular the rounded form of the first base section, reduces the weight compared with a solid first base element and allows the first base element to be available for receiving the iiquid poured into the cup.

According to a further advantageous embodiment of the invention, the first base element exhibits a notch through which iiquid can escape when the cup is aligned with the opening pointing downwards. This is particuiarly an advantage when rinsing the cup. To that end the cups are usually aligned with the cup opening pointing downwards. Since the first base element in extension of the cup wall protrudes beyond the second base element, the first base element and second base element form a cavity in which liquid can collect when the cup is aligned with the opening pointing downwards. The notch prevents this.

According to a further advantageous embodiment of the invention, the first base element exhibits a plurality of downward-facing protrusions. These may for example take the form of pimples. With the protrusions the cup touches a surface on which it stands.

According to a further advantageous embodiment of the invention, the handle connecting piece is arranged close to the top edge of the cup body. The handle connecting piece extends outwards. At the end facing away from the cup body the grip piece extends downwards from the handle connecting piece and is distanced from the cup body.

The handle connecting piece may be flat or arched.

According to a further advantageous embodiment of the invention, the handle connecting piece comprises a web running horizontally essentially parallel to the base area of the truncated cone that the cup wall spreads and two reinforcing elements extending downwards from the web that connect the grip piece with the outside of the cup wall of the cup body. The web is equipped with the continuous surface. Advantageously passages through which liquid can escape when a cup is aligned with the cup opening pointing downwards are provided on the web and/or on the reinforcing elements.

According to a further advantageous embodiment of the invention, the handle connecting piece exhibits passages through which the liquid can escape during rinsing. The cross-section of each passage is small compared with the surface of the handle connecting piece. The sum of the cross-sections of all passages of a handle connecting piece is also small compared with the surface of the handle connecting piece. The passages therefore do not reduce or reduce only slightly the air resistance that the handle connecting piece experiences in free fall or flight. In free fall or flight turbulence is created at the passages.

In their cross-section the passages may for example be triangular, rectangular, exhibit another polygonal form or be round. The form may be symmetrical, however this is not absolutely essential.

According to a further advantageous embodiment of the invention, the grip section is rounded or chamfered on the side facing away from the cup body. This avoids edges or corners that could cause injury if the cup collides with a person.

The rotation of the cup in free flight or free fall that is achieved through the geometry of the cup has the result that the cup is aligned with its flexible cup wall downwards. If it meets a person with this wall, the danger of injury is considerably reduced.

Further advantages and advantageous embodiments of the invention can be obtained from the following description, the drawing and the claims.

Drawing

The drawing shows a model embodiment of the invention and another example. Illustrations:

Figure 1 Mode! embodiment according to the invention of a stackable cup in a perspective view from above

Figure 2 The cup as shown in Figure 1 in a view from the side

Figure 3 The cup as shown in Figure 1 in a perspective view from above

Figure 4 The cup as shown in Figure 1 in a perspective view from below

Figure 5 The cup in the alignment as shown in Figure 2 in a cross-section view

Figure 6 The cup as shown in Figure 1 in a cross-section view

Figure 7 Model of a cup not according to the invention in a perspective view from above

Figure 8 The cup as shown in Figure 7 in a view from the side

Figure 9 The cup in the alignment as shown in Figure 8 in a cross-section view

Description of the model embodiment

Figures 1 to 6 show a model embodiment according to the invention of a stackable cup with a cup body 1 and a handle 2. The cup body 1 exhibits a cup wall 4 and a base with a first base element 5 and a second base element 3. The handle 2 exhibits a handle connecting piece 6 and a grip piece 7. The cup wall 4 runs in a conical shape from top to bottom. It spreads a truncated cone rotationally symmetrically around an axis of symmetry 8. The base area of the truncated cone coincides with the cup opening 19. From the cup opening the cup wall 4 tapers downwards. The axis of symmetry 8 is marked in Figure 5. The longitudinal axis 8a and the centre of gravity 8b of the empty cup are also drawn in on Figure 5. The longitudinal axis 8a is the vertical axis that runs through the centre of gravity 8b of the empty cup. The longitudinal axis 8a is parallel to the axis of symmetry 8.

The second base element 3 of the cup body 1 takes the form of an inclined plane. This is particularly discernible in Figures 5 and 6.

The first base element 5 is located on the underside of the cup body 1 in extension of the cup wall 4. It protrudes beyond the first base element 3 and forms a termination on the underside of the cup body that runs parallel to the top edge 18 of the cup wall 4. The top edge 18 limits the cup opening. The top edge 18 also runs in the same plane as the base area of the truncated cone that the cup wall 4 spreads. The surface area of this truncated cone is parallel to the base area. The first base element 5 runs at least partially in the plane that is defined by the surface area of the truncated cone. The first base element 5 takes a form that allows the cup to be deposited on a surface. The first base element 5 is rounded on the side facing downwards. It forms a ring encompassing the second base element 3. The ring is arranged both adjacent to the cup wall 4 and adjacent to the second base element 3.

As can be discerned in Figures 3, 5 and 6, the first base element 5 is hollow on the inside and open towards the inside of the cup body. On its underside the first base element 5 is equipped with protrusions 9 in the form of pimples with which the cup touches the surface when placed on a surface.

The second base element 3 exhibits a lowest level 11 and a highest level 12. These are represented in Figure 5. The lowest level 11 and the highest level 12 are located away from the centre of the cup body 1 that is defined by the axis of symmetry 8. The lowest level 11 and the highest level 12 are adjacent to the cup wail 4. They are only separated from the latter by the first base element 5. The lowest level 11 and the highest level 12 are thus the greatest possible distance from one another. A notch 10 of the first base element 5 is located close to the highest level 12 of the second base element, it is located adjacent to the highest Sevei 12 and prevents liquid from being able to accumulate in the cavity formed by the second base element 3 and the first base element 5 when the opening of the cup is pointing downwards. The wail forming the first base element is pulled in part upwards at the notch 10. The depth of the notch corresponds to the highest level 12 of the second base element.

Stacking lugs 13 discernible in Figures 5 and 6 are provided on the inside of the cup wall 4. These favour the separation of cups arranged in a stack.

The grip piece 7 of the handle 2 is open downwards and tapers from bottom to top. If is chamfered at its upper end and lower end in order to avoid injuries.

The handle connecting piece 8 exhibits a flat web 14 running essentially horizontally and reinforcing elements 15 and 16 extending downwards from the web. The web 14 is provided with passages 17 dose to the cup wail 4 and dose to the grip piece 7. The upward-facing surface 18 of the handle connecting piece forms a continuous surface that is airtight. It ensures increased air resistance in this area in the case of a free fall or free flight of the cup. The air resistance is greater in the area of the handle 2 than at the diametrically opposite side of the cup body 1 since no handle and no other components are arranged on this side. This supports a turning of the cup.

The reinforcing elements 15 and 16 connect the outside of the cup wall 4 to the grip piece 7. They increase the flexural strength of the handle connecting piece 6.

The passages 17 are triangular in cross-section. Two of the four passages in total are adjacent to the cup body 1. The other two passages are adjacent to grip piece 7. The sum of all cross-sections of the passages 17 is small relative to the surface of the handle connecting piece 6. The air resistance that the cup experiences in the area of the handle connecting piece in free flight or free fali is therefore not reduced significantly by the passages.

The second base element 3 running obliquely causes the cup body to turn around an axis perpendicular to the axis of symmetry 8 in the event of the free fail or free flight of a cup filled with liquid. The cup turns in the direction of the lowest level 11 of the second base element. The turning motion is additionally brought about in that in free fall or free flight the cup experiences greater air resistance at the handle connecting piece 6 than at the diametrically opposite side. This has the result that in free fall or free flight the cup is decelerated more strongly at the handle than at the diametrically opposite side. This supports the turning motion of the cup in the direction of the lowest level 11 of the base. For this reason the highest level 12 of the second base element of the cup body is provided beiow the handle connecting piece 6 and the lowest level 11 of the second base element on the diametrically opposite side. Since the air resistance causes the cup to be decelerated more strongly in the area of the handle connecting piece than the liquid contained in it, the cup empties in flight.

It has been shown in tests that in free flight or free fall the cup aligns downwards with that part of the cup wall diametrically opposite the handle 2. Due to the radius of the cup wall and the pliability of the cup wall there is almost no danger of a person being injured if hit by the cup. Ail edges of the cup, particularly the top edge 18 of the cup wail 4, the handle connecting piece 6 and the top and bottom ends of the grip piece 7, are rounded. The first base element 5 is likewise rounded. This further reduces the danger of injury.

Figures 7 to 9 represent a model of a stackable cup not according to the invention. In contrast to the first model embodiment the cup according to this model embodiment exhibits only a cup body 21 and no handle. The cup body 21 corresponds to the cup body 1 of the first model embodiment. It exhibits a cup wail 24 and a base with a first base element 25 and a second base element 23. The cup wall runs in a conical shape from top to bottom. At the top side it defines the cup opening of the cup. From the opening the cup wail tapers downwards. The cup wall is rotationally symmetrical around its axis of symmetry 28.

The second base element 23 of the cup body 21 has an inclined form. This is particularly discernible in Figure 9. The second base element 23 takes the form of an inclined plane.

The first base element 25 is located on the underside of the cup body 21 in extension of the cup wall 24. It protrudes beyond the second base element 23 and forms a termination on the underside of the cup body that runs parallel to the top edge 34 of the cup wall 24. The first base element 25 takes a form that allows the cup to be deposited on a surface. The first base element is rounded on the side facing downwards. It forms a ring encompassing the base element 23. The ring is arranged both adjacent to the cup wall 24 and adjacent to the second base element.

As in the first model embodiment, the first base element 25 is hollow on the inside and open towards the inside of the cup body 21. On its underside the first base element 25 is equipped with protrusions 29 in the form of pimples with which the cup touches the surface when placed on a surface.

The second base element 23 exhibits a lowest level 31 and a highest level 32. These are represented in Figure 9. The lowest level 31 and the highest level 32 are located away from the centre of the cup body 21 that is defined by the axis of symmetry 28. The lowest level 31 and the highest level 32 are adjacent to the cup wall 24. They are only separated from the latter by the first base element 25. The lowest level 31 and the highest level 32 are thus the greatest possible distance from one another. A notch 30 of the first base element 25 is provided adjacent to the highest level 32 of the base. It prevents liquid from being able to accumulate in the cavity formed by the second base element 23 and the first base element 25 when the opening of the cup is pointing downwards. The wall forming the first base element is pulled in part upwards at the notch 30. The depth of the notch corresponds to the highest level 32 of the second base element.

The cup wall 24 is equipped with stacking lugs 33 on its inside. This is shown in Figure 9. The stacking lugs favour the separation of cups arranged in a stack.

The oblique form of the second base element 23 ensures that a cup filled with liquid turns in such a way in free flight or free fall that the opening of the cup body points to the side and the liquid can escape. The cup is thereby emptied in fall or flight. The danger of injuries is therefore reduced.

List of reference numbers 1 Cup body 2 Handle 3 Second base element 4 Cup wall 5 First base element 6 Handle connecting piece 7 Grip piece 8 Axis of symmetry 8a Longitudinal axis 8b Centre of gravity of the empty cup 9 Protrusion 10 Notch 11 Lowest level of the base 12 Highest level of the base 13 Stacking lug 14 Web 15 Reinforcing element 16 Reinforcing element 17 Passage 18 Top edge of the cup wail 19 Cup opening 20 21 Cup body 22 23 Second base element 24 Cup wall 25 First base element 26 27 28 Axis of symmetry 29 Protrusion 30 Notch 31 Lowest level of the base 32 Highest level of the base 33 Stacking lug 34 Top edge of the cup wail

Claims

A stackable plastic cup with a cup body (1) forming a container and open upwardly, with a bottom (3, 5) in the cup body (1), with a cup opening (19) in the cup body (1), with a beaker wall (4) in the beaker body (1) clamping a cone stub with a cover surface and a base surface, with the cup opening (19) coinciding with the base surface, with a handle showing a grip portion (7) and a male connecting portion (6) which connects the grip portion (7) to the cup body (1) and protrudes outwardly from the cup body, the male connector portion (6) exhibiting a substantially closed surface which is air-impermeable so that on the male connector portion, upon flow of air in free flow or free fall, a higher air resistance than at the diametrically opposite side of the cup, thereby producing a torque on the cup, with a center of gravity (8b) for the empty cup and with a longitudinal axis (8a) of the cup extending through the center of gravity (8b) for the empty cup vertically in relation to the cup standing on a horizontally oriented base, the bottom having a first bottom part (5), whereby the cup with the cup opening (19) pointing upwards can be placed on a support, the bottom having a second bottom part (3) having several various levels which, on a beaker substantially oriented horizontally, are above the level of the first bottom part (5), characterized in that a highest level of the second bottom part is adjacent to the cup wall near the grip part and a deepest level diametrically opposite also adjacent to the beaker wall on the side of the beaker body facing away from the grip member, and the center of gravity of the at least partially fluid-filled beaker is displaced away from the longitudinal axis (8a) and in the diametrically opposite direction relative to the grip member (7). that with the liquid-filled cup, the weight force due to the above-ground liquid column is greater on that side of the cup facing away from the grip portion than on the diametrically opposite side, whereby the cup oriented upwardly with the cup opening rotates or tips in free fall or free flight, and the opening in the cup body is oriented sideways or downwards.

Stackable beaker according to claim 1, characterized in that the cone stub clamping the beaker wall (4) is symmetrical with respect to two mutually perpendicular planes.

Stackable cup according to claim 2, characterized in that the center of gravity of the at least partially filled cup is away from the straight line along which the two planes intersect perpendicularly.

Stackable beaker according to one of the preceding claims, characterized in that the cone stub clamping the beaker wall (4) is rotationally symmetrical about a axis of symmetry (8) and that the center of gravity of the beaker is at least partially filled with a liquid. to the axis of symmetry (8) of the beaker body (1) in the diametrically opposite direction relative to the grip portion (7).

Stackable cup according to one of the preceding claims, characterized in that the second bottom part (3) is formed at least sectionally as an inclined plane.

Stackable cup according to one of claims 1 to 4, characterized in that the second bottom part (3) is curved at least sectionally inward or outward.

Stackable beaker according to one of Claims 1 to 4, characterized in that the second bottom part (3) has the highest and the lowest level at the cup which stands on a substantially horizontally oriented base, and that the bottom between the highest level and the deepest level exhibits at least one step.

Stackable cup according to one of the preceding claims, characterized in that the first bottom part (5) is rounded.

Stackable cup according to one of the preceding claims, characterized in that the first bottom part (5) forms an annular ring or several ring segments on the underside of the cup body (1).

Stackable cup according to one of the preceding claims, characterized in that the first bottom part (5) is hollow inside and is open towards the interior of the cup body (1).

Stackable cup according to one of the preceding claims, characterized in that the first bottom part (5) has at least one incision (10), through which a cup oriented with the cup opening downwards flows out which, upon rinsing, collects on the side of the cup. the second bottom portion (3) facing away from the interior of the container.

Stackable cup according to one of the preceding claims, characterized in that the first bottom part (5) has several downwardly projecting projections (9).

Stackable cup according to one of the preceding claims, characterized in that the male connection part (6) is located near the upper edge of the cup body (1) on the cup wall (4) and that the grip part (7) extends downwardly from the male connection part (7) and is spaced apart from the beaker body (1).

Stackable beaker according to one of the preceding claims, characterized in that the male connection part (6) has at least two substantially perpendicular to the closed flat extending stiffening elements (15, 16) connecting the grip part (7) to the outside of the beaker wall. (4).

Stackable beaker according to one of the preceding claims, characterized in that the handle part (17) on its side facing away from the beaker body is rounded or beveled.