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People like to bring mineral water with them when they are outside working, shopping etc. The water in the bottle decreases after drinking, but the volume of the bottle is still the same. It is inconvenient to put such a big thing in a bag, and it also takes up too much space when it is recycled and stored. The telescoping water bottle may solve the problem. Its size can be changed according to the quantity of the water. Whether they are in bags or in hands, even throwing them into the dustbins, the telescoping water bottle will save space, and make it convenient to take or recycle.
Tianjin University of Technology