This bottle can hold 550ml of liquid and when empty folds down to half its size. It is easily into a bag or purse or your carry-on luggage.The flip cap has a leak proof seal that will hold even when roughly treated. It also has a spill-proof spout for on-the-move refreshment.MADE FROM FDA APPROVED MATERIALS : the material is safe. It will not leach even in extreme temperatures.DURABLE AND EASY TO CLEAN, silicone is a durable and stain resistant material that can withstand bumps and scrapes. To clean you can wash in warm, soapy water or put it in the dishwasher.Collapsible water bottle, it won't crack or shatter when accidentally dropped on the ground. No more worries that children will broken it.