Description Made by the hydration experts HydraPakA(R), our PocketFlaskTM 500ml has a 28mm narrow mouth for a slimmer profile design that provides an optimal fit in the side pockets of Janji&&';;s Pace Shorts, Trail Shorts, and Trail Half Tights/Tights. Featuring a low-profile, tapered welded bottom and an easy-fill 28mm mouth for nutrition mixing, this flask is also topped off with a locking cap to prevent unwanted spillage or drips. As you drink, the flask can compress down to minimize water sloshing on the run. Features 28mm narrow mouth design with locking cap for leak-proof in/outs Low-profile pinch-welded flange design for optimal drop-in pocket fit 500ml measurement guide BPA and PVC free Top rack dishwasher safe (best to avoid high heat settings) Backed by the BeyondTM Lifetime Guarantee through HydraPakA(R) Materials + Specs Volume: 500ml (17oz) Weight: 32g (1.1oz) Materials: thermoplastic polyurethane sleeve, silicone bite valve, polyoxymethylene cap Made in China