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In the group activities, we usually drink the same brand of drink or mineral water. But it is easy to mix your own drink with others. This cap of water could solve the problem.The bottle cap is made with a thin layer of sponge on the basis of a common bottle cap, the sponge on the bottle cap could made you find your bottle conveniently. When looking down from the above, you can recognize your own symbols without picking it up and checking it again. What’s more, a thin sponge are more likely to leave an imprint, you could use your finger nails or hard objects to draw your own exclusive symbol that would make your water bottle uniq
XI'AN UNIVERSITY OF SCIENCE AND TECHNOLOGY
XI`AN, U.S. Outlying Islands