Item Type: Sippy Cup Cap Material: Silicone 1Premium Material: The cap is made with thick, premium food grade silicone that won't easily break or fall apart, non toxic and harmless, children can also use with confidence. 2Prevent Leakage: This special octopus shape design can perfectly match most of the cup mouth, three use methods can be switched arbitrarily, it is not easy to loosen, effectively preventing water leakage. 3Practical: The straw and silicone lids could turn any cup into a straw sippy cup, so that children can drink water at any time outside, and the included storage box can ensure that the product is clean and hygienic. 4Application: It works great to help children change from drinking duckbill cups to regular bottles. Use them for milk, water or whatever your toddler like to drink. 5Easy to Wash: Hand wash in warm, soapy water or boil for couple minutes or place in the top rack of dishwasher, silicone material is durable, please clean it after use for next time use.1 x Storage Box 1 xOctopus Shaped Lid 1 x Straw