Stainless, Vacuum Insulated Hydro Flask Growler Stainless Steel, Double Wall Vacuum Insulated (keeps beer cold a long time), 64 Oz Growler from Hydro Flask. Keeps beer or water cold for up to 24 hours. Powder coated Black Matte Finish, Premium Grade 18/8 Stainless. BPA Free. Lifetime warranty. Hydro Flask Insulated Stainless Steel Wide Mouth Water Bottle and Beer Growler, 64-Ounce, Black More: Recent Amazon Finds