Travel Gadgeteer Collapsible Water Bottle 750ml + Leak Proof Valve | BPA-Free Food-Grade Silicone Open and lock with one hand, easy for drinking while holding 750ml (26 oz) liquid Medical grade silicone material Wide opening for drinking, easy to wash and large enough to use with ice cubes Spill-proof valve, water comes out when squeezing, special design for collecting air Collapsible for easy transport, making it a unique and ideal travel accessory