【Perfectly Compatible】 Our straw caps have a diameter of 10mm (0.4in) and are designed to be perfectly compatible with the Stanley 40 oz/30 oz tumbler with handle, as well as the simple modern 40 oz tumbler with straw. They also fit all large-diameter long straws with a diameter of 9-11mm, but please confirm the size of your straw before purchasing the straw cover cap. 【3D Design and Practical】 Different from most of the flat product designs on the market, our product is a 3D design, which looks like a cat drinking water, very vivid and cute. 【Perfect Gift】The Stanley cup straw cover is small and portable which is a great option for a wide range of situations, they are perfect gift idea on Mother's Day, Birthdays, Valentine's day,Christmas, Thanksgiving, New Year and other festivals. 【Easy to Carry】: This portable straw lid kit is small and easy to carry, making it perfect for outdoor activities like walking, camping, and hiking. 【What You Get】You will get 2PCS stanley straw cover. This straw cap is suitable for Brumate, Stanley, Yeti and Starbucks cup, suitable for 30 40 Oz cup. The style is cat play the ball, very cute.