8oz BLACK Polyjuice Potion black flask These are also good for concerts and big parks where you dont want a stainless flask to shine and be visible. These remain unseen. This flask measures 5-3/4" x 3-5/8". This 8oz stainless steel polished powder coated flask is a great buy! The sturdy design, screw down cap, smooth and shiny surface and thick powder coating combine to make this a high quality buy at a super low wholesale price. This unique drinking flask sports a durable shiny black coating that not only looks great but adds durability and style! Individually gift boxed for easy distribution