CamelBak's Stainless Steel Better Bottle has no inner liner or coating to ruin the taste of your drink. With a double-wall insulated stainless-steel construction, it will keep your drink warm or cold, and it is very durable. Its easy-sipping Big Bite Valve is simple, effective and won't spill if left open. An integrated handle makes it a cinch to carry the Bottle with a finger or clip it to a carabiner. Plus, the Bite Valve flips down flush with the bottle to keep it clean. And of course, like all of CamelBak's bottles, it's 100% BPA free.