Stainless Steel Cap

Hydroflask’s Stainless Steel Cap sets the bar for quality and innovation. Hydro Flask is proud to announce the release of the Stainless Steel Flat Cap.The Flat Cap fits on our Standard Mouth flasks, including the 12oz and 21oz flasks. The Stainless Steel Flat Cap is perfect for those who wish their liquids never touch any plastic. The top is made from polypropylene number 5 (PP5), while the inner threading is made from 18/8 stainless steel, which ensures an all stainless steel contact with the flask’s contents.Like all Hydro Flask products, the Stainless Steel Flat Cap is both BPA- and toxin-free.