CONVEYOR CONVEYOR WITH PANEL FIELD OF THE INVENTION The present invention relates to a container conveyor having a plurality of first receiving openings, at least one second receiving opening, and a prominent integral panel. DESCRIPTION OF THE PREVIOUS TECHNIQUE Conventional container conveyors are often used to join a plurality of containers of similar sizes, which may be cans, bottles, jars and boxes, although other types of packages or containers may be attached. Traditionally, bottle and can transporters that have a prominent display panel are one-piece cardboard conveyors, and not plastic ring conveyors. The plastic ring conveyor produces a united package of containers, using little material. However, when it is used, it only has little or no space to print advertising or promotional material. Conversely, the box conveyor has a relatively large surface area for promotional graphic designs. Disadvantageously, the box conveyor requires a relatively large amount of material, allows the bottles to fall if it is not held vertically and upward, and generally wraps a large part of the containers inside. Accordingly, there is a need for a package that incorporates the stability and economy of a ring conveyor, and the promotional surface of a box conveyor. anderer, U.S. patent 3,325,004 and Owen, U.S. Pat. 3,504,790, each teaches a conveyor configured to be attached to an upper portion and a lower portion of each of a plurality of containers. The Owen and Wanderer patents both teach a conveyor having a plurality of upper rings and lower rings divided by a handle and by belts, respectively, where each upper ring is attached to an upper portion of a container, and each lower ring it is attached to a lower portion of a container. Schaich, U.S. Patent No. 3,460,863, teaches a tubular length of material having opposing openings to join the containers. The conveyor taught by the Schaich patent requires an annular extrusion die or other devices for manufacturing a continuous tubular length of material. SUMMARY OF THE INVENTION It is an object of the present invention to provide a container conveyor that unifies a plurality of containers in a tight and solid package. It is another object of the present invention to provide a container conveyor which provides a large panel for marketing information. It is another object of the present invention to provide a container conveyor that restrains the lateral and vertical movement of the containers relative to one another. It is another object of the present invention to provide a container conveyor that maintains a material separation between each adjacent container that is inside the package. It is yet another object of the present invention to provide a container conveyor that incorporates the stability and economy of a ring conveyor, and the promotional surface of a box conveyor. A conveyor in accordance with the present invention is preferably used to join multiple elongated containers, which may be bottles or cans, by joining a portion of the neck and a middle portion of the container. The conveyor comprises a flexible, sturdy and flat sheet having a first lateral edge, a second lateral edge and two longitudinal edges. A plurality of first receiving openings are formed in the sheet, near or on a first side edge of the sheet. At least one second receiving opening is preferably formed in the sheet at a distance from the first receiving openings. In a preferred embodiment of the present invention, the at least one second receiving opening is positioned on a second side edge of the sheet. A panel is formed in the sheet, and placed between the first receiving openings and the at least one second receiving opening. A panel width is approximately equal to a width of the sheet between the longitudinal edges, and a panel length is approximately equal to the distance between the first receiving apertures and the at least one second receiving aperture. Preferably, a handle is integrated to the sheet, or is adjacent to the panel. According to another preferred embodiment of the present invention, the conveyor further comprises a plurality of third receiving openings. At least two of the third receiving apertures are positioned on the second side edge of the sheet, and at a second distance from the at least one second receiving aperture. A second panel is thus formed within the second distance between the third receiving openings and the at least one second receiving opening. The conveyor joins a plurality of elongated containers to form a package. Each of the first receiving apertures preferably is attached to the neck portion of one of the containers, and each of the at least one second receiving aperture is attached to the middle portion of at least one of the containers. The resulting package includes a C-shaped conveyor where the panel is flat and adjusted relative to the containers. The width and height of the panel preferably corresponds to a width and height of the package, resulting in a prominent promotional surface in the package. BRIEF DESCRIPTION OF THE DRAWINGS The aforementioned characteristics and objectives of the present invention, and others, will be better understood from the following detailed description, taken in conjunction with the drawings, where: Figure 1 is a top view of a conveyor according to a preferred embodiment of the present invention. Figure 2 is a perspective view of a package of containers using the container conveyor shown in Figure 1. Figure 3 is a top view of a container conveyor according to another preferred embodiment of the present invention. Figure 4 is a perspective view of a package of containers using the container conveyor shown in Figure 3. Figure 5 is a top view of a container conveyor according to another embodiment of the present invention. Figure 6 is a top view of a container conveyor according to another preferred embodiment of the present invention. Figure 7 is a top view of a container conveyor according to another preferred embodiment of the present invention. Figure 8 is a top view of a container conveyor according to another preferred embodiment of the present invention. Figure 9 is a top view of a container conveyor according to another preferred embodiment of the present invention. Figure 10 is a perspective view of a container package utilizing the container conveyor shown in Figure 9. Figure 11 is a top view of a container conveyor in accordance with yet another preferred embodiment of the present invention. invention. Figure 12 is a perspective view of a package of containers using the container conveyor shown in Figure 11. DESCRIPTION OF THE PREFERRED MODALITIES Figures 1 to 12 show the conveyor 10 for transporting a plurality of containers 5. containers 5 shown in Figures 2, 4, 10 and 12 are preferably bottles or cans. The containers 5 are preferably of similar sizes within a single conveyor 10. In addition, the containers 5 preferably comprise a neck portion or slit 7 in an upper section of the container 5 and a middle portion 8 defined in approximately the middle third of the container. container 5. The conveyor 10 uses a plurality of containers 5 to create the package 1, like the package 1 shown in Figures 2, 4, 10 and 12. The conveyor 10 comprises a flat sheet 15 with a first side edge 17, a second side edge 18 and two longitudinal edges 19. The sheet 15 is constructed , preferably, of a flexible and resistant material such as plastic. In a preferred embodiment of the present invention, the sheet 15 is made of low density polyethylene. The sheet 15 of material is preferably cut, using shapes known to those skilled in the art, such as dies, to form a plurality of first receiving openings 20 in the sheet 15. Preferably, at least two first receiving openings 20 of the plurality of first receiving apertures 20 are positioned near the first side edge 17 of the sheet 15. Similarly, the at least one second receiving aperture 25 is preferably formed in the sheet 15 at a distance 27 from the first receiving apertures 20. In one embodiment Preferred of the present invention, the second receiving openings 25 are placed on the second lateral edge 18 of the sheet 15. The panel 40 is preferably formed in the sheet 15 and is positioned between the first receiving openings 20 and the at least one opening second receiver 25. In a preferred embodiment of the present invention, the panel 40 has a panel width 42 approximately runs corresponding to a width 16 of the sheet 15 between the longitudinal edges 19. Preferably, the panel length 43 corresponds approximately with the distance 27 between the first receiving openings 20 and the at least one second receiving opening 25. The panel 40 preferably accommodates, on one or both sides, UPC and proof of purchase labels, graphic designs and promotional and / or other information related to the content and / or ingredients of the package 1. The panel 40 is preferably generally continuous and uninterrupted, without cuts or openings, in all its defined surface. In a preferred embodiment of the present invention, the conveyor 10 further comprises a line of perforations 50 that divides the panel 40 from the second receiving openings 25. The line of perforations 50 may be formed with a series of slots through the sheet 15. or a reduction in the thickness of the sheet 15. Preferably, the conveyor 10 is folded over the line of perforations 50. In a preferred embodiment of the present invention, which is shown in Figures 11 and 12, the line of perforations 50 divides the plurality of the first receiving openings 20 of the panel 40. According to a preferred embodiment of the present invention, the conveyor 10 further comprises the handle 35 integrated with the sheet 15. Preferably, the handle 35 is integrated between the panel 40 and the first receiving openings 20. In another preferred embodiment of the present invention, shown in Figure 11, the handle 35 is integrated between the receiving openings The first 20. As shown in Figure 6, according to another preferred embodiment of the present invention, the conveyor 10 further comprises a plurality of third receiving openings 30. Preferably, at least two third receiving openings 30 of the plurality of third receiving openings 30 are placed on the second side edge 18 of the sheet 15. The third receiving openings 30 are preferably placed at a second distance 32 from the second receiving openings 25. In accordance with a preferred embodiment of the present invention which possesses a plurality of third receiving openings 30, the conveyor 10 further comprises a second panel 45 positioned between the third receiving openings 30 and the second receiving openings 25. Like the panel 40, the second panel 45 can provide additional promotional surface in the package 1. The conveyor 10 described above is configured to join a plurality of elongated containers 5, which results in package 1. Package 1 preferably includes two or more containers 5. In a preferred embodiment of the present invention shown in Figure 2, package 1 includes three bottles; in another preferred embodiment of the present invention, which is shown in Figure 4, package 1 includes six bottles; In still another preferred embodiment of the present invention, which is shown in Figure 10, package 1 includes two bottles; and in yet another preferred embodiment of the present invention, package 1 includes six cans. The conveyor 10 can be made to hold any combination of two or more containers 5. As shown in Figures 2, 4, 10 and 12, each of the first receiving openings 20 is preferably attached to the neck or crevice portion. 7 of one of the containers 5. Preferably, the first receiving opening 20 slides on the neck portion 7 of the container 5, and a surface of the sheet 15 surrounding the first receiving opening 20 is joined with the slot 9, stopper 6 or similar surface of the container 5. As further shown in Figures 2, 4 and 10, each of the second receiving openings 25 is joined to the middle portion 8 of one of the containers 5. In this preferred embodiment, the containers 5 are preferably bottles. Preferably, the middle portion 8 comprises approximately the middle third of a length of the container 5. Preferably, a diameter of the middle portion 8 of the container 5 is larger than a diameter of the second receiving aperture 25, which consequently results in a stretching joint of the conveyor 10 with the container 5. In another preferred embodiment of the present invention, which is shown in Figure 12, the second container receiving opening 25 is joined with a middle portion 8 of each container 5. In this preferred embodiment, the containers 5 are preferably cans. Such a single container receiving opening 25 is preferably formed by the central band 60. In a preferred embodiment of the present invention, the central band 60 includes a pull tab 54 to facilitate access to the containers 5 in package 1. As As a result of the union described above with containers 5, a profile of the conveyor 10 is preferably a "C" shaped curve with respect to the containers 5. Preferably, the conveyor 10 bends a lot over the line of perforations 50 adjacent to the second receiving openings 25, as shown in Figures 2, 4 and 10, or the first receiving openings 20, as shown in Figure 11. The panel 40 is preferably flat and adjusted relative to the containers 5, which results on a prominent and visible display surface or sign. The panel width 42 between the longitudinal edges 19 of the sheet 15 preferably corresponds to a width of the package 1. In a preferred embodiment of the present invention, the panel width 42 slopes inward and toward the first receiving openings 20, as shown in Figures 5 and 7. Additionally, as a result of the above described union with the containers 5, the conveyor 10 provides and retains a material separation between each adjacent container 5 within the package 1. This material separation is important to protect containers 5, as in the case of glass bottles, of breaking or abrasion. This material separation is less important when the containers 5 are cans, and therefore the preferred embodiment of the present invention shown in Figures 11 and 12 does not require this material separation. In a preferred embodiment of the present invention having third receiving openings 30, the conveyor 10 is attached to the containers 5 as described above, although, however, the third receiving openings 30 are also attached to the neck portion 7 of the containers 5. Each third receiving opening 30 preferably overlaps a first receiving opening 20 and is attached to the neck portion 7 of a container 5. In the preferred embodiment of the present invention having third receiving openings., the conveyor 10 preferably also comprises a second panel 45 placed between the third receiving openings 30 and the second receiving openings 25. The second panel 45 is preferably placed on an opposite side of the pack 1 from the panel 40. In this way, the package is delimited on two sides by the panels 40 and 45, resulting in a longitudinal coverage of the package 1 by the conveyor 10. In a preferred embodiment of the present invention, which is shown in Figure 6, the conveyor 10 comprises double the receiving openings 20 that third receiving openings 30. The third receiving openings 30 shown in Figure 6 are joined only with a single row of containers 5, thereby reducing the material necessary to manufacture the conveyor 10, but still This results in a firm package with two panels 40 and 45 for product promotion. As shown in the Figures, various removal devices of the containers 5 can be integrated, such as pulling eyebrows 54 or perforated removal strips 55, with respect to the conveyor 10, including the panel 40. These removal devices assist the consumer to remove the conveyor 10 containers 5 in a very tight connection. Although the present specification of the present invention was described in relation to certain preferred embodiments, and many details were described for the purpose of illustration, it will be apparent to those skilled in the art that the conveyor 10 is susceptible to additional modalities, and that some of the details described herein may vary considerably without departing from the basic principles of the present invention.