Durable, double walled, vacuum insulated 18/8 stainless steel design keeps beverages hot in the growler up to 41 hours and cold up to 76 hoursBPA free construction adds peace of mindTextured grip is glove friendly, keeping hands warm and dry while you pour from the 64 ounce growlerDouble hinge tpu lid tether is flexible, preventing wear and tearBolt on, high impact, full grip handle ensures you'll never lose the capThis product contains Stainless Steel (Iron, Chromium, Nickel, Manganese), Formaldehyde, Octamethylcyclotetrasiloxane