Drinking is as easy as flipping a switch. Simply press down on the back of the mouthpiece and the straw springs into position. When you're finished hydrating, the straw locks back into a protected, leak-proof position. Flexible carrying loop folds so it can stowaway in your lunch bag, backpack, or cupboard. BPA and phthalate free. Bottle can be easily disassembled to allow for thorough cleaning. Dishwasher safe.