Tumbler (glass)

A tumbler is a flat-floored beverage container usually made of plastic, glass or stainless steel.

Theories vary as to the etymology of the word tumbler. One such theory is that the glass originally had a pointed or convex base and could not be set down without spilling. Another is that they had weighted bottoms which caused them to right themselves if knocked over.^{[citation needed]}

Originally, the term tumbler referred to a type of drinking glass with a pointed or rounded base, which prevented it from being put down until it was empty, encouraging the drinker to finish their beverage in one go.^{[citation needed]} Over time, the design evolved into the flat-bottomed glassware we are familiar with today, which can comfortably sit on tables and counters without tipping over.^{[citation needed]} The modern tumbler comes in various sizes and shapes, designed to accommodate a wide range of beverages from water and juice to sophisticated cocktails.^[1]