For over 20 years, its simple, lightweight and flexible design have made the SoftBottle(TM) a classic. Still the lightest and most compact bottle Platypus makes, the SoftBottle is your source for easy hydration whether tooling around the city, traveling, or hitting the trail. Details Highly packable: When empty, the SoftBottle easily flattens and rolls up compactly, saving space. Smart design: Bottle narrows at the middle to make it easy to hold. Versatile: Available with either a Closure Cap or a Push-Pull Cap; accepts any threaded Platypus lid or drink tube kit. Pure Platy experience: Materials are taste-free, BPA-free, BPS-free, and phthalate-free. Specs Weight: 1.2 oz Made in the USA Materials: Nylon, Polyethylene, Polypropylene