A shot glass is a small, typically cylindrical glass designed for serving strong spirits and liqueurs in small quantities, usually 1 to 2 ounces. Its compact size and sturdy construction make it ideal for quick consumption of a single measure of alcohol, often referred to as a "shot." Shot glasses are commonly made of thick, clear glass to withstand the impact of repeated use and to showcase the color of the liquor inside.

Shot glasses are an essential tool in bars and are frequently used for serving straight spirits, such as tequila, vodka, or whiskey. They are also used for measuring ingredients in cocktails and for serving layered shots, where different liqueurs are carefully poured to create visually appealing layers. The shot glass's simplicity and functionality make it a staple in both casual and professional drinking settings, contributing to the ritual of toasts and celebrations.