LIGHTWEIGHT & PORTABLE & COLLAPSIBLE: The 19oz (550ml) travel portable water bottle can be easily rolled up or flattened to save space, this product comes with a metal hook so you can always carry it aroundSAFE TO DRINK: The collapsible water bottle is made of food-grade silicone and food-grade plastic lid, BPA-free, odorless, reducing your carbon footprintHOT AND COLD RESISTANT: The foldable water bottle can withstand temperatures from -40 to 200 and is dishwasher safe. The silicone water bottle makes it excellent impact resistance and adaptable to a variety of active placesLEAK-PROOF: Features a secure, leak-proof seal and is designed to withstand drops and impacts, eliminating the seepage of liquid from the inside and preventing the bottle from opening accidentally, making it ideal for active lifestylesEASY TO CLEAN: Designed with a wide mouth opening for quick, hassle-free cleaning. Dishwasher safe. For first time use, it is recommended to boil the steam goods at high temperature for 15 minutes