Made by the hydration experts HydraPak®, our SoftFlaskTM 500ml is designed to integrate seamlessly with vests and belts, as well as the drop-in side pockets on our Trail Shorts, Half Tights and Tights. Featuring a low-profile, tapered welded bottom and an easy fill 42mm wide mouth for nutrition mixing, this flask is topped off with a locking cap to prevent unwanted spillage and a handy measurement guide, just in case. Features: 42mm wide mouth design with locking cap for leak-proof in/outs Low-profile pinch-welded flange design for easy 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 HydraPak®