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When to travel, backpack will always be a bottle of water, but a lot of debris inside the backpack,
easy to crash into the bottle caps cause loose items inside the bag will be wet or broken,
the backpack will be wet. Cap Keeper solve this problem, flexible silicone protects the bottle,
we will not have to worry!
Tunghai University
Xitun District, Taichung City, Taiwan
HSIN-FANG TU,
Tunghai University
