Coverless Twist Cup Tumbler
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- Using silicone membrane and a revolutionary design, this new cup has no lid. Instead, you just need to turn the silicone membrane over the top of the cup and observe if the seal is formed.
- The silicone membrane is adjustable, leaving enough space for the straw to pass through the top. Just place the straw in the opening, and then tighten the membrane until the straw is snugly in place. When using the new seal, no liquid comes out of the cup fells out.
- The cup is very easy to use, just twist the top film and observe the quickly formed seal on the top of the cup. If you want to cool your drink, this cup can also be used in the refrigerator.