The Platypus Platy 2-Liter Ultralight Collapsible Water Bottle is not just an outdoor essential, but an everyday, everyone, everywhere essential. Reusable, and refillable, it's significantly lighter in weight than a hard water bottle of comparable volume and, when empty, collapses to take up a fraction of the space. While it's designed for outdoor pursuits like camping, thru-hiking, and backpacking, it's also perfect for travel, when space is at a premium, and is a safe option for the pool and beach, or anywhere that glass is impractical or hazardous. BPA-free, BPS-free, and phthalate-free, its food-grade polyethylene liner does not retain flavors, so it can hold water one day, and wine the next. When filled, the base expands so that the bottle stands upright; screw top keeps contents secure. The Platypus Platy 2-Liter Lightweight Foldable Water Bottle is compatible with all Platypus caps and drink tubes, and can be paired with a water filter, and the GravityWorks Water Filtration System. Bottle weighs just 1.3 ounces and measures 13.8 x 17.5 inches; total capacity of 2.1 liters (70 ounces). Made in the USA. Manufacturer's limited lifetime warranty.