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Perfect Matching: This straw cover cap is specifically designed for Stanley cup straw. The 10mm(0.39inch) diameter perfectly matches 30&40 oz Tumbler. You don't have to worry about get the wrong size at all.It is also suitable for other straws with a diameter of 10mm(0.39inch).
Funny Straw Covers: We have designed straw caps with ball and game themes, which can help you relax even while working. At the party, your water cup will also be the most eye-catching. You can share this funny little item with your family and friends.
Reassuring Material: Our straw cap for Stanley cup are made of food grade silicone, BPA free, safe and odorless, it's reusable, hand washable and dishwasher safe. Please use it with confidence. Please note that our package only includes 6 pcs silicone straw covers, straws are not included.
Protecting Your Beverages: When you temporarily stop drinking beverages, do you worry about dust or other things getting into the straw? Our anti-dust straw cap can perfectly solve this problem for you. It not only prevents dust, but also prevents spills, making it very suitable for parties or outdoor activities.
Easy to Use: The straw cap has a silicone ring fixed to the straw, which can still be hung on the straw after opening the cover, so it won't be lost. This straw cover cap is small and lightweight, making it easy to carry around.