What does a tumbler do?

A tumbler is a type of drinking glass that typically has a flat bottom and no handle, designed for serving beverages like water, juice, or cocktails. Its design allows for easy handling and storage, making it versatile for various occasions. Tumblers can be made from various materials, including glass, plastic, or stainless steel, and are often used in both casual and formal settings. Some tumblers are insulated to keep drinks cold or hot for extended periods.