【Straw Covers】You will get 4 colorful straw caps. They fit for Stanley 40 oz/30 oz 10 mm (0.4 in) glass straws. 【Fashionable Design】Our straw cover adopts a pressable design to protect the straw and relieve pressure. The fashionable tie-dye process makes each straw cover unique, and you will never confuse your cup with someone else's cup again! 【Easy to Carry】The straw toppers has a compact appearance and is equipped with a storage box for easy carrying. It's dust, fly and splash proof. It's perfect for indoor and outdoor activities. 【Safe Material】The straw cap is made of food-grade silicone material, Strong, flexible, reusable and easy to clean. 【Best Present】Great accessories for Stanley Cup : A best present whether for family or friends.