This stainless steel flat cap fits all hydro flasks that are standard mouth size bottles. This standard mouth stainless steel flat cap has a 100% stainless steel interior with a low-profile, BPA-free polypropylene top. The high quality, 18/8 stainless steel interior ensures that your drinks will never touch any plastic, keeping them completely insulated and odor free. The stainless steel flat cap fits all 12oz and 21oz standard mouth Hydro Flask bottles. 

Dimension : 14cm x 10cm x 7.5cm   Weight : 30g