Lock-top. Pop-top. One-handed sipping On-The-Fly.A slim shape and fortified cap make On-The-Fly ideal for care-free storage in work bags, gym bags, backpacks and cup holders. Opens easily for convenient one-hand refreshment on the fly. Locks to prevent spills.Nalgene On-The-Fly Bottle FeaturesBottle Made In the USA- Local goods mean local jobs and fewer emissions. Cap made in China.BPA/BPS Free-So you can drink water that\'s safe and tastes great.Built to Last-Our durable goods are made to last a lifetime.Dishwasher Safe-Safe to put in the dishwasher and easy to clean.Fits Cupholders-This bottle fits in cupholders so you can take it with you on the road or at the gymFits Ice Cubes-Put ice in your bottle with ease and enjoy your frosty beverage anywhere.Leak-Proof Guarantee-Continuous, straight shouldered semi-buttress threads keep the bottle sealed tight.