Hydro Flask Stainless Steel Flat Cap

Out of stock
The Flat Cap fits on Hydro Flask's 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.
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