Swig Life’s stainless steel drinkware features triple-insulated technology for premium temperature retention and has a non-slip silicone base. The hammered texture is a one-of-a-kind combination of an insulated stainless steel travel mug mixed with the feel of a cocktail mug. Swigs make the perfect gift and are a great eco-friendly option. Oh! Yes! Hand wash only. Do not Microwave. Made of Stainless Steel.