The perfect size and flexibility to go anywhere and comes with a caribener clip for convenient accessibility. Made by Vapur for Chipotle the Reflex is a half litre (18 oz) bottle that is collapsible and rolls up to be stowed away when empty. The removable cap makes it easy to fill and clean. BPA-free and made of three layers of ultra-durable plastic. Dishwasher safe. Freezable.