The Evoc Backpack Hydration Bladder makes your backpacks hydration packs.Evoc Backpack Hydration Bladder Features• Slide-Seal™ Top with Tether• 36” HydraFlex™ Tube• Blaster™ Bite Valve• Plug-N-Play™ Connect System• Removable Pack Clip• Silicone Lubrication• Basic Care & Use InstructionsMaterial: THERMOPLASTIC POLYURETHANE; HDPE; SILICONE2L 130g, 17 x 32 cm3L 140g, 18 x 42 cm
Best Price: £34.99 from Leisure Lakes Bikes