Karrimor Hydration Bladder The Karrimor Hydration Bladder is an indispensable accessory for outdoor activities like walking and cycling. It fits almost any hydration-compatible rucksack or hydration pack, making it ideal for upgrading your backpack or replacing an old drinks bladder. Constructed from hygienic TPU material, it ensures a clean and safe hydration experience. This hydration bladder has a large screw cap for easy filling and cleaning. The bite valve also features a dust cover to keep the valve clean. Capacity: 1L / 2L / 3L Material: Plastic. Colour: blue