With the OTF's convenient, one-handed cap design, you don't have to drop everything to take a sip For Your Everyday Adventures! Take your Nalgene bottle to the gym, office, camping, exploring and everywhere in between. Its slim shape and leak-proof cap make it ideal for workbags, gym bags, and backpacks alike. Put your OTF in your pack with confidence. The simple to use lock keeps things dry. We designed the hinge so the lid stays in place and won't bump your nose when you take a swig..Whether you're looking for a virtually indestructible water bottle for a backcountry adventure, or you want a clean, green way of storing your dry pasta, you'll find a Nalgene product that gets the job done..Nalgene is a proud part of Thermo Fisher Scientific, for 70 years Nalgene has been making a wide range of BPA/BPS free reusable water bottles and containers to suit your personal preferences, needs and lifestyle here in the USA.