The ETS Express Ember Tumbler 16 oz combines innovative temperature control with premium design for the ultimate drinking experience. Made from durable 18/8 stainless steel with a reinforced matte coating, this smart tumbler keeps your beverage at your preferred temperature for hours using Ember’s advanced heating technology. It features a rechargeable built-in battery, app connectivity, and a smart LED indicator for effortless control. Complete with both a leak-proof handle lid and a spill-proof sliding lid, this high-tech tumbler is an excellent choice for custom branding, executive gifts, and premium corporate promotions.