Description: The bladder is Tasteless,made of friendly TPU material can be recycled easily. Compatible with most backpacks. Compact water bladder design and built for a long life for durable use. The water reservoir stands upright when full and shrinks in the min volume while empty, perfect for space-saving. opening with lid strengthened and makes easy to refill, clean and inside the water bladder. -light water storage bladder bag is portable enough can be put compactly in your vest. Great backpack reservoir replacement for kids and adult. Drinking water the lid directly without stopping your steps or taking off your running backpack. Convenient reservoir for your outdoor , Running, Hiking, Cycling, Climbing. Specification: Material: TPU Size: 500ML 26x9.5x4.5CM/10.2x3.7x1.7inch Package Includes: 1 Piece Bladder Note: Size for manual measurement, there may be a 0 to 1 cm error, belongs to the normal phenomenon. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!