>>1401754That's HDPE, same thing you'll find in a milk jug. Perfectly safe, hard plastic. Though Klean Kanteen does offer a metal option with food-grade silicon seal.
Even so, since the water does not rest against the lid, even if it was made out of estrogen-leaking material typically found on a racer bottle, the exposure would be minimal.
Sad what racers will do to shave grams when these exist. I'm thankful for the durable steel water bottles that keep my testosterone high and last a lifetime
