Whether you take your Nalgene Wide Mouth Loop Top Water Bottle to the gym or clip it to your gear loop on a burly trad route, its convenience and durability will have you hooked. The Lexan bottles are virtually impossible to break—when you drop yours from 60 feet onto rocks below, you'll believe us. They can also withstand temperatures from –200F to 200F, so don't worry if the beverage in your Nalgene Lexan Bottle freezes during a winter overnighter. (We don't recommend putting boiling water in Lexan bottles.) The HDPE bottles, while not as strong as Lexan, are lightweight, durable, and great for hikes, soccer games, and kickboxing class.