This is not your usual water bottle. This is a collapsible water bottle we got from Amazon that can be folded when not in use, so no more hassle of carrying an empty water bottle. It's a 600ml bottle, it uses uses food grade silicone so it’s BPA free, you can store hot as well as cold drinks. Link to Folding Water Bottle: http://sillycorns.shop/ Subscribe to Sillycorns for more cool gadgets! #Sillycorns