Most hydro bottles do not use high quality stainless steel, the flask punctures easy, they leak, rust quickly, dent easier and most importantly do not stay cold as long. You demand so much. We know. We do too. We’ve built our bottles using True Stainless Steel Grade Metal, thickest of its kind. Whether you need a gym bottle, bike bottle, or the best sports bottle, this bottle is built to be your last bottle, The Coldest Water.