Keep your little one hydrated on the go and at home with our HYDRATE incredibly cool cup Insulated base keeps drinks cooler for longer, even on hotter -spill, durable, 100% silicone straw is soft and gentle on teeth and gums and fully integrated with the valve, making it easy to clean and avoid nasty bacteria build-up Pop open, push closed hygiene cover protects the straw from dirt and germs when not in use Designed to be easily disassembled and top rack dishwasher safe for easy cleaning and ultimate convenience.