Is a shot glass jigger?

A shot glass is not a jigger, although both are used for measuring liquids. A jigger is a specific measuring tool used in bars and restaurants to ensure accurate proportions for making cocktails and mixed drinks. It consists of two bowls of different sizes, joined together by a central body, and is typically used to measure spirits and other ingredients. On the other hand, a shot glass is a small glass used to serve alcoholic beverages in individual servings, typically for taking straight or in mixed drinks. While a shot glass can be used as a rough estimate for measuring ingredients in a drink, it is not as precise as a jigger and is not the standard tool used by professional bartenders.