Flexible Platypus Bottles are everything that a hard bottle isn't - 80% lighter & they pack down to next-to-nothing when empty.
Made with FDA approved, food-grade polyethylene.
Platypus reservoirs are flexible, not hard. The more you drink, the smaller it gets. When empty, roll it up and store until next time.
Made of a triple laminate material that is super strong and puncture resistant. Strong enough to withstand boiling, freezing and squashing.
Covered by a lifetime warranty.