Style # SFC Size: Color: Stainless
Hydro Flask's Stainless Steel Flat Cap is perfect for those who prefer their liquids never touch any plastic. The top is made from polypropylene PP#5, while the inner threading is made from 18/8 stainless steel, which ensures an all stainless steel contact with the flask's contents.
Fits on standard mouth 12 oz and 21 oz flasks
BPA- and toxin-free.
Durable 18/8 stainless steel material