201107200 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種產品容器。 【先前技術】 牵物，t來’現代社會製造了大量的廢棄物，並且許多瘤 ==解速率非常緩慢的塑膠及/或金屬。這些材質若不 ςΓΐ ’就只有堆棄於海洋或水域，或棄置於垃圾掩埋 %，吊專待極長的時間才會被分解。 ^了減少永久存在於垃圾掩埋場中的廢棄物，發展生 α性及/或可堆肥容器具有極佳的前景。然而，為解 ’、达及零售問題，近年來利用塑膠材質之「掀蓋式」包 來包裝產品的情形逐漸增加，其主要訴求在於能使 =費者在選購時，可清楚地看見包裝中的内容物。這種掀 盍式的包裝常常會在盛裝易腐敗物品時產生問題，尤其針 料些需要維持在-定濕度範圍内的產品，其主要是因為 这種包裝方式無法對内部的濕度進行精確的控制，因此通 吊會加速內容物的腐敗。 掀蓋式包裝（例如海耶司（Hayes)於美國專利第 6845978號中所提出者）亦造成環保上的問題，尤其消費 者已逐漸認為使用歸是危害環境的行為，如此—來更導 致對於購買使料種包n品的意願降低。 另外，塑膝籃子亦使用在盛裝各式各樣的每果，且其 通常是生物不可分解性，從而增加垃圾掩埋射的廢棄 201107200 物0 習知已有紙製的產品容器，其例如麥斯威爾 (Maxwell)於美國公開專利第2〇〇8/〇3〇28〇8號、於dm 年η月26號申請之日本專利第6156469號、愛維利 (Avery)於美國專利第4982872號、以及力姆aim)等 人於WIPO專利公開號2008/076075令所揭露者。雖然紙 製產品容器其大部分皆為生物可分解性，但是除此之外， 仍未能解決_製掀蓋式包裝所具有的其他缺點。 因此，如何生產一種生物可分解性容器，其可使消費 者在選料’能由各種不㈣度看見其中的内容物，且亦 能精確控制容H内賴度，已成為—項重要的課題。 【發明内容】 本發明包含裝置、系統及方法，其係揭露—種容器 用於盛裝產品或其他易變質的物品。此容器包含—網齡 性網狀結構，且此網狀結構具有—纖維側邊二 、/氐。卜網狀結構包含複數網狀單元。須特別說動 二作:文:所使用的「產品」—詞意指水果、蔬菜及肩 :::物，當然’其他產品(例如非食用性產品)亦可, 網狀結構包含複數㈣單元，且此些喊單元 義出複數視覺上非閉人的網a /、Π疋 一司η二 在本文中所使用的「網」 「非門入仏3規則或不規則的圖樣。在本文中所使用的 ^」—詞係指在正常室_光強度τ，至少7 201107200 可，光能夠穿過網孔，且依此定義包含略不透光的狀態， 或疋至少可通過的光量與無上色的玻璃窗相同的狀態。 舉例而言，上述的網，其可為杲有波樣描線狀之網狀 早70的結構’或在一區域内具有較周圍區域密度為高之網 狀單元的結構。另外，上述的網，其可具有規則的結構， 包含例如但不限於菱形或方形網狀單元所形成的圖樣。 在本發明較佳實施例中，網孔的表觀面積總和是佔網 狀結構之表觀面積總和之至少4〇%，更佳是佔網狀結構之 表觀面積總和之至少5〇%，且最佳是佔網狀結構之表觀面 ^總：之至少60%。本文中所使用之網籃的「表觀面積」 為網籃各邊、各壁面及可增設之上蓋的外側表面積。因 :匕’舉例而言’即便網籃具有一凹陷的底部，底部在凹陷 4分的整體外側表面亦屬於網M的表觀面積的—部份。 然而’在與網狀單元的外表面相比較時，各網孔的側 —’則不列入網籃的表觀面積。此外，若網藍沒有設置上 盖或其他閉合單元時，表觀面積也不包含上端開口部分。 需特別說明的是，除非本文内容特別指出顯有不同 二否則在此所提及的範圍’解釋上應包含其所指的末端 。另外，在此使用的開放式範圍應解釋為.僅用於包含 =上的實際價值、。同樣地，除非文意中指出顯有不同， 有列出之數值應視為包含中間值。 Z可選擇設置-或多個薄膜層，其較佳覆蓋網孔之 的表觀面積總和。較佳地’薄膜層實質上為 迷月’但疋亦不排除半透明的薄膜層。 201107200 【實施方式】 以下將參照相關圖式，詳細說明本發明的各式組成物 L性貝、悲樣及特點，其中相同的元件將以相同的來昭 符號加以說明。 … 請參考圖1所示，網籃1〇〇係用於盛裝產品。網銘wo 可包含-剛性網狀結構102，且網狀結構1〇2具有一側壁 綱及-底部106。需特別說明的是，網籃的側壁⑽較 佳係具有與底部106不同的網狀結構。另外，網狀結構⑽ 亦可選擇性地設置有一上蓋（圖未示）。 *網籃1G0較佳係具有網狀結構1()2、封閉底部1〇6、 上端開口 108以及纖維侧壁1〇4。其中，網狀結構搬呈 有足以保護内容物_性，以避免其發生碎裂。網藍⑽ 係設計能承受高達5G剌重量而不會發生明顯的變形。 較佳地，網籃_能承受至少5碎、至少1()碎、至少μ 石旁、至少20碎、以及更佳能承受至少3㈣的外力而不會 發生明顯的變形。本文所使用之「纖維側壁」一,音产含 有纖維材料的壁體，且纖維材料為此壁體結構中社^ 份。本發明中較佳的纖維侧壁至少具有佔其乾重量之以 5%、1〇%、观、或甚至观的纖維。纖維側壁較佳是0含 有其乾重量之80%或90%的纖維。 本文所使用的「纖維材料」—詞意指―種材料，其特 徵在於具有複數分離的纖維。絲狀纖維可由植物或動物體 内萃取’或以合成方式、或組合使用上述方法而取得。並 中，「植物萃取纖維」一詞意指纖維中至少複數絲狀纖維 201107200 是源自於植物體，例如木材、紙草、稻米、標屬植物 樹、植物纖維、棉花、絲蘭屬植物、遭麻、弓弦大麻b 西聞亞麻。-般而言，紙材可視為_種纖維材料， 是由濕潤之纖維經過擠壓及脫水過程而掣成 網籃_可料-❹種生物可分解性㈣所 舉例而言，包含模切紙（dle eutpaper)、塗膠硬紙板 製纖維以及其他纖維材料。本文所使用之「生物可分解性 材料」-詞意指-種材料’其可在六個月為期的時間内， 由天然存在的微生物，例如細菌、真菌、藻類等，在 壤境下分解至少90%，而產生私〇、Γη C〇2以及生質 广0職）。舉例而言，肉類、植物、木材、棉、動物蛋 白以及紙在此皆可視為生物可分解性。 蛋 網籃100的剖面為長方形，但其剖面亦可為圓形、俨 圓形、或其他任何適於生產販㈣水平形狀。 ^ 網狀結構Η)2較佳包含複數網狀單幻1()，且由此此 ^單元m共同組成網狀結構⑽。各網狀單元_ 義出一網孔112的至少一 Αβ八 孔⑴。網孔112較_視二==同地定義出複數網 閉合的網孔m使得使用閉5的孔洞。視覺上非 見其，的内容物，而==100的上方或底部看 ^ 向不而將内谷物移出網籃100，即俑县 對設置有上蓋的網藍_而言，亦不需要打開上蓋疋 在本發明難實施射，纟· 112的表觀面積總和是 構之表觀面積總和之至少，/。，更佳地是佔網狀 聋之表親面積總和之至少_ ’且最佳地是佔網狀結構 201107200 之表觀面積總和之至少5〇%。 其包^複網狀單元110定義出—規則圖樣， 亦可定暴〇/、 '形形狀的網孔112。當然，網孔112 ㈣、^其他規則圖樣，舉例而言，包含菱形、圓形、 定義中 大小尺相孔洞。除此之外，網孔112還可 6不規則圖樣，舉例而言，包含圖3及圖4所示者。 方飞2構的數里、尺相及面積皆可依據網籃的使用 褒iΓί度及剛性而改變。因此，舉例而言，用於盛 ^稽。Γ監可具有較盛裝蘋果的網1為小的網狀結構 二：’網孔可以為任何適於生產販售的大小尺寸及 形狀，例如圓形、方形以及長方形。 =參考圖i所示，網籃⑽可包含一薄膜層120，並 復盖網孔112 $矣兹目工d Μ < 至少_ 2 之至少一部分，較佳地覆蓋 之上❹m之表規面積總和，更佳地至少覆蓋網籃100 以使薄膜層120較佳是為透明，或至少為半透明， :吏用者此透過此薄膜層12G看見網籃_的 二、且同時能維持網籃100内部的渔度。薄膜層120 _疋猎由黏貼或其他適於生產販售之方式固定於網籃 薄膜層m之滲透性較佳是能夠在網藍⑽ 限内提供足夠的抗水性。其中，使用期限較佳係為14天』 =更佳係可尚達28天。此外，薄膜層⑽可 孔洞，使空氣能夠適度地流通，叫保網籃⑽t的内^ 201107200 物能維持最佳的新鮮度。 區域 儘管薄膜層12〇可用以覆蓋網籃_ 網 :100亦可另外設置其他類型的薄膜層以覆：二 舉例而言，第一薄膜層可用以覆蓋底部106:’：區域。 側壁104。接著，當内容物置入網籃i⑽後，碉監100的 可再藉由黏貼或其他適於生產販售的固定矜第j薄膜層 1〇〇。除此之外，亦可用橡膠帶固定薄膜層=固定於網籃 上述情況下’雖然本文並未表示㈣層的數t = ’在 本發明領域具通常知識者錢合理軸 a、為何， 而言，適於生產販售的.合理數量地舉例 薄膜層no較佳係由一或多種生物可分^生材 1，'而能提供半滲透性、至少部分透明以及防潮等性 質，且藉此來精確地控制網籃100中内容物的潮濕程产。 薄膜層可依據網籃100中内容物以及其使用的外在'心ς不 同而調整。薄膜層120較佳可例如但不限於已量產者，如 Maverick™ ' Bloomer Plastics™ ' Natural Flexible™ ' Hvlon® 以及EarthFirst®聚乳酸。 網籃100之内表面的至少一部份可包含滲透阻擋層， 以降低其表面的轉移率，且同時維持網籃1〇〇的剛性。在 本文中所使用之表面「包含滲透阻擋層」一詞意指表面經 過添加劑處理，且此添加劑具有在常溫且正常大氣壓力 下’以每六個月測量一次的單位時間内，水及/或葵花油的 轉移率小於或等於50 μΐ/cm2的特性。 滲透阻擋層較佳係由植物性、石化蠟、硫化乳膠、植 10 201107200 物树知及破璃紙所組成。其他適於使用的滲透阻擋層材料 包含哈得森（Hodson)於美國專利第73447S4號或威爾斯 (WllS)於美國公開專利第200050130261號中所提出者。 圖2為依據本發明另一實施例之網籃2〇〇的示意圖， 其具有網狀結構202形成於至少四側壁204及底部206。 至於其餘圖2中相同於圖1所示的標號，則代表與圖！所 示相同的元件。 圖3為依據本發明又一實施例之網籃的示意圖， 其具有不規則的網狀結構3G2。至於其餘圖3中相同於圖 1所示的標號，則代表與圖丨所示相同的元件。 、 圖4為依據本發明又一實施例之網 q〜π血-rw印不忍圖， …、有不規則的網狀結構術，且此網狀結構3()2係由弦 線410所組成，藉以形成複數網孔化。至於其餘圖 相同於圖1所示的標號，則代表與圖1所示相同的元件。 圖5為依縣發明又—實_之網籃的示意圖， 其具有-上蓋530 ’且此上蓋具有含複數網孔53 網狀結構说。雖然在本實施例中，網藍500 _狀^ ;二係?二Γ的網狀結構532相同’但在其他實施態 1中’此崎亦可為不同的網狀結構。上蓋Μ ，、 式的構型或其他適於生產販售的構型。至於1餘二 同於圖1所示的標號，則代表與圖1所示相同的元件。目 以上所达僅為舉例性，而非為限制性者。 ^發明之精神與_，而對其進行之料修^脫= 應包含於後附之申請專利範圍中。 /文更句 201107200 【圖式簡單說明】 圖1為依據本發明實施例之一種網籃的示意圖； 圖2至圖4為依據本發明不同實施例之網籃的上視 圖；以及 圖5為依據本發明另一實施例之具有上蓋之網籃的侧 視圖。 【主要元件符號說明】 100、200、300、400、500 :網籃 102、202、302、402、502、532 :網狀結構 104、204、304、404、504 :側壁 106、206、306、506 :封閉底部 108 :上端開口 110、210、310、510 :網狀單元 112、212、312、412、512、534 :網孔 120 :薄膜層 410 :弦線 530 :上蓋 12201107200 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a product container. [Prior Art] Pulling, t come 'Modern society makes a lot of waste, and many tumors == plastics and/or metals with very slow rate of dissolution. If these materials are not ’ ‘, they will only be dumped in the ocean or waters, or they will be disposed of in the landfill. The hoist will take a long time to be decomposed. ^Reducing wastes that are permanently present in landfills, and developing bio- and/or compostable containers have excellent prospects. However, in recent years, in order to solve the problem of 'defective' and retail, the use of plastic materials in the "clamshell" package to gradually package the product has gradually increased. The main appeal is that the package can clearly see the package when purchasing. Content in the middle. This type of packaging often causes problems when it is used to contain perishable items, especially those that need to be maintained within a constant humidity range, mainly because this type of packaging does not allow precise control of internal humidity. Therefore, the crane will accelerate the corruption of the contents. Clamshell packaging (such as those proposed by Hayes in U.S. Patent No. 6,845,978) also poses environmental problems, especially as consumers have come to believe that the use of environmentally damaging behaviors is such that The willingness to purchase the seed package is reduced. In addition, the plastic knee basket is also used to hold a variety of fruit, and it is usually biodegradable, thereby increasing the waste of landfill 201107200. 0 It is known that there are paper product containers, such as Maxwell. (Maxwell), U.S. Patent No. 2,8/3, No. 28,8, Japanese Patent No. 6,156,469, to Dm, No. 26, and Avery, U.S. Patent No. 4,982,872. And the disclosure of LAM Aim) et al. in WIPO Patent Publication No. 2008/076075. Although most of the paper product containers are biodegradable, in addition, other disadvantages of the lid-type packaging have not been solved. Therefore, how to produce a biodegradable container, which enables consumers to see the contents of the material in a variety of degrees, and also accurately control the tolerance of the H, has become an important issue. . SUMMARY OF THE INVENTION The present invention comprises apparatus, systems and methods for exposing a container for containing a product or other perishable item. The container comprises a network-aged network structure and the network structure has a fiber side two, / 氐. The mesh structure comprises a plurality of mesh units. Special mention must be made: Text: The term "product" used means the fruit, vegetables and shoulders:::, of course, 'other products (such as non-edible products) may also, the network structure contains plural (four) units And these shouting units have a visually non-closed net a /, Π疋一司 η II used in this article "net" "non-door into 3 rules or irregular patterns. In this article The word "^" used means that in normal room _ light intensity τ, at least 7 201107200, light can pass through the mesh, and as defined herein, includes a state that is slightly opaque, or at least the amount of light that can pass through The colored glass windows are in the same state. For example, the above-mentioned net may be a structure in which a mesh-like mesh-like shape is 70, or a structure in which a denser network unit is denser than the surrounding area. Additionally, the mesh described above may have a regular structure including, for example, but not limited to, a pattern formed by a diamond or square mesh unit. In a preferred embodiment of the present invention, the total apparent area of the mesh is at least 4% by weight of the total apparent area of the mesh structure, and more preferably at least 5% by weight of the total apparent area of the mesh structure. And the best is at least 60% of the apparent surface of the network structure. The "apparent area" of the basket used in this paper is the outer surface area of each side of the basket, each wall surface and the upper cover. For example, 匕', for example, even if the basket has a concave bottom, the entire outer surface of the bottom at 4 points of the depression belongs to the portion of the apparent area of the mesh M. However, the side of each mesh is not included in the apparent area of the basket when compared to the outer surface of the mesh unit. In addition, if the net is not provided with a cover or other closed unit, the apparent area does not include the upper opening portion. It is to be expressly stated that unless the context specifically indicates otherwise distinct, the scope of the reference herein should be construed to include the term. In addition, the open scope used here should be interpreted as .only used to include the actual value of =. Similarly, unless stated otherwise in the context, the values listed are considered to include the intermediate values. Z may optionally be provided - or a plurality of film layers, which preferably cover the sum of the apparent areas of the mesh. Preferably, the film layer is substantially moon-shaped, but the translucent film layer is not excluded. [Embodiment] Hereinafter, various constituents of the present invention will be described in detail with reference to the related drawings, and the same elements will be described with the same reference numerals. ... Please refer to Figure 1, the basket 1 is used to hold the product. The mesh may include a rigid mesh structure 102, and the mesh structure 1〇2 has a side wall and a bottom 106. It should be particularly noted that the side wall (10) of the basket preferably has a mesh structure different from the bottom 106. In addition, the mesh structure (10) may also optionally be provided with an upper cover (not shown). * The basket 1G0 preferably has a mesh structure 1 () 2, a closed bottom 1 〇 6, an upper end opening 108, and a fiber side wall 1 〇 4. Among them, the mesh structure is moved to protect the content _ sex to avoid fragmentation. The Net Blue (10) is designed to withstand up to 5G 剌 without significant deformation. Preferably, the basket is capable of withstanding at least 5 pieces, at least 1 () broken, at least μ stone side, at least 20 pieces, and more preferably capable of withstanding at least 3 (four) external forces without significant deformation. As used herein, "fiber sidewall", the sound product contains a wall of fibrous material, and the fibrous material is a member of the wall structure. Preferred fiber sidewalls in the present invention have at least 5%, 1% by weight, or even a view of the fibers by weight of their fibers. Preferably, the fiber sidewalls comprise fibers having 80% or 90% of their dry weight. As used herein, "fibrous material" - the term means a material that is characterized by a plurality of discrete fibers. The filamentous fibers can be obtained by extracting from plants or animals' or by synthetic methods or in combination. In addition, the term "plant extract fiber" means that at least a plurality of filamentous fibers in the fiber 201107200 are derived from plant bodies such as wood, papyrus, rice, plant trees, plant fibers, cotton, yucca, Hemp, bowstring marijuana b West smell linen. In general, the paper material can be regarded as a kind of fiber material, which is formed into a basket by the wetting and dehydration process of the wet fiber. In the case of the biodegradability (4), for example, the die cut paper is included. Dle eutpaper), rubberized cardboard fibers and other fibrous materials. As used herein, "biodegradable material" - the term means - a material that can be decomposed in the soil by naturally occurring microorganisms such as bacteria, fungi, algae, etc. over a period of six months. 90%, and the result is private, Γη C〇2, and a wide-ranging job.) For example, meat, plants, wood, cotton, animal proteins, and paper can all be considered biodegradable. The egg basket 100 has a rectangular cross section, but the cross section may also be circular, round, or any other suitable shape for the manufacturer. ^ The network structure Η) 2 preferably comprises a plurality of mesh-like phantoms 1(), and thus the unit m together constitutes a network structure (10). Each mesh unit _ defines at least one Αβ eight hole (1) of a mesh 112. The mesh 112 defines the complex mesh as compared with the second == the closed mesh m makes it possible to use the closed 5 hole. Visually, the content is not seen, and the top or bottom of ==100 does not move the inner grain out of the basket 100, that is, the county has no need to open the top cover for the net blue provided with the upper cover.疋 In the present invention, it is difficult to implement the shot, and the sum of the apparent areas of the 纟·112 is at least the sum of the apparent areas of the structure. More preferably, it is at least _' of the total area of the cousin of the mesh, and is preferably at least 〇% of the total area of the mesh structure 201107200. The packet-shaped mesh unit 110 defines a regular pattern, and may also define a mesh 112 of a smashing shape. Of course, the mesh 112 (four), ^ other rule patterns, for example, include diamonds, circles, and defined size holes. In addition, the mesh 112 may also have an irregular pattern, for example, including those shown in Figures 3 and 4. The number, length and area of the Fangfei 2 structure can be changed according to the use of the basket and the degree of rigidity and rigidity. So, for example, it is used to hold it. The tamper may have a smaller mesh structure than the net 1 containing the apple. 2: The mesh may be of any size and shape suitable for production, such as round, square and rectangular. Referring to Figure i, the basket (10) may comprise a film layer 120 and cover the mesh 112 at least a portion of at least _ 2, preferably covering the surface area of the ❹m Preferably, preferably at least covering the basket 100 such that the film layer 120 is preferably transparent, or at least translucent, such that the user sees the basket _ through the film layer 12G while maintaining the basket 100 internal fishing. The film layer 120 is fixed to the basket by pasting or other means suitable for production. The film layer m preferably has a permeability sufficient to provide sufficient water resistance within the mesh blue (10) limit. Among them, the period of use is preferably 14 days 』 = better system can be up to 28 days. In addition, the film layer (10) can be holed, so that the air can be properly circulated, and the inside of the basket (10)t can maintain the best freshness. Area Although the film layer 12 can be used to cover the basket_net: 100, other types of film layers can be additionally provided to cover: For example, the first film layer can be used to cover the bottom 106:': region. Side wall 104. Then, after the contents are placed in the basket i (10), the monitor 100 can be pasted or otherwise attached to the fixed 矜 j film layer. In addition, the rubber film can also be used to fix the film layer = fixed to the basket in the above case. Although the number of layers in the (four) layer is not shown in the present invention, it is reasonable for the person in the field of the invention to have a reasonable axis a, why, Suitable for the production and sale. A reasonable number of examples of the film layer no are preferably one or more bio-separable raw materials 1, 'can provide semi-permeable, at least partially transparent and moisture-proof properties, and thereby The wet process of the contents of the basket 100 is precisely controlled. The film layer can be adjusted depending on the contents of the basket 100 and the external 'mind' of its use. The film layer 120 is preferably, for example but not limited to, a mass-producer such as MaverickTM 'Bloomer PlasticsTM ' Natural FlexibleTM 'Hvlon® and EarthFirst® polylactic acid. At least a portion of the inner surface of the basket 100 can include a permeation barrier to reduce the rate of transfer of its surface while maintaining the rigidity of the basket. The term "including a permeation barrier" as used herein means that the surface is treated with an additive and that the additive has a unit time measured every six months at normal temperature and normal atmospheric pressure, water and/or The transfer rate of sunflower oil is less than or equal to 50 μΐ/cm 2 . Preferably, the osmotic barrier layer is composed of phytochemical, petrochemical wax, vulcanized latex, zhi 10 201107200, and glass paper. Other osmotic barrier materials suitable for use include those taught by Hodson in U.S. Patent No. 73,474 S4 or Wells (WllS), U.S. Patent No. 200050130261. 2 is a schematic view of a basket 2 according to another embodiment of the present invention having a mesh structure 202 formed on at least four side walls 204 and a bottom portion 206. As for the rest of the figures in Figure 2 that are the same as those shown in Figure 1, the representative and figure! The same components are shown. 3 is a schematic view of a basket according to still another embodiment of the present invention, having an irregular mesh structure 3G2. As for the remaining reference numerals in Fig. 3 which are the same as those shown in Fig. 1, they represent the same elements as those shown in Fig. 1. 4 is a diagram showing a network q~π blood-rw print in accordance with still another embodiment of the present invention, having an irregular mesh structure, and the mesh structure 3() 2 is composed of a string 410. In order to form a complex mesh. The rest of the figures are the same as those shown in Fig. 1, and represent the same elements as those shown in Fig. 1. Fig. 5 is a schematic view of a basket of the invention according to the county, which has an upper cover 530' and the upper cover has a mesh structure including a plurality of meshes 53. Although in the present embodiment, the mesh 532 of the cyber blue 500 _ ^ 二 二 相同 相同 相同 相同 相同 但 但 但 但 但 但 但 但 但 但 但 但 但 但 。 。 。 。 。 。 。 。 。 。 。 。 。 The upper cover, the configuration of the type, or other configurations suitable for production and sale. The same reference numerals as those shown in Fig. 1 denote the same elements as those shown in Fig. 1. The above is only an example and not a limitation. ^ The spirit of the invention and _, and the material to be repaired = should be included in the scope of the attached patent. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of a basket according to an embodiment of the present invention; FIGS. 2 to 4 are top views of a basket according to various embodiments of the present invention; and FIG. 5 is based on A side view of a basket having an upper cover in accordance with another embodiment of the present invention. [Main component symbol description] 100, 200, 300, 400, 500: baskets 102, 202, 302, 402, 502, 532: mesh structures 104, 204, 304, 404, 504: side walls 106, 206, 306, 506: closed bottom 108: upper end opening 110, 210, 310, 510: mesh unit 112, 212, 312, 412, 512, 534: mesh 120: film layer 410: string 530: upper cover 12