Love your collapsible Platy Bottle' You'll love it even more when you turn it into a hydration system with the Platypus Drinking Tube Kit. We know how you feel about those great liquid transporters that pack down to nothing when empty, and the Drinking Tube Kit will make your heart even fonder. The kit attaches easily to any Platypus reservoir, and comes with a bite valve and clip to keep it handy and drip-free.