The TRITAN used in the bottle is a safe, BPA-free resin that is clear, like glass. It’s so sturdy it won’t even crack if you drop it on a rocky surface, so it has become the best for outdoors use.

The lid has a silicone strap, so you can hang it from a carabiner, and never have to worry about losing it.

The inner lid (splashguard), which comes standard with the STOUT AIR, is extremely handy.