（1）It can be used to transport liquid food materials conveniently and safely.
（2）Compared with the other same volume tank, it is light and stackable which can be stacked to 4 layers.
（3）Containers can be folded to reduce storage space and cost.
（4）Use disposable food grade plastic bags internally to facilitate cleaning in the later stage.
（5）One single person is enough to fold it.
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