A tumbler is a versatile drinking vessel, typically made from stainless steel, plastic, or glass. Known for its durability and insulating properties, many tumblers feature double-wall vacuum insulation to keep beverages hot or cold for extended periods. They often come with a spill-proof lid and are popular for both hot drinks like coffee and cold beverages like water or iced tea. Tumblers are widely used for travel, commuting, and outdoor activities, offering convenience, sustainability, and style while helping reduce the use of disposable cups.