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