Crystal Light is a brand of low-calorie powdered beverage mixes produced by Kraft Heinz. It's popular for its variety of flavors, which range from fruit-based to tea and lemonade options.

When used as an ingredient in cocktails, Crystal Light serves as a flavorful, sugar-free alternative to traditional mixers. This makes it particularly appealing for those looking to reduce sugar intake or calorie content in their drinks without sacrificing flavor.

In the context of alcohol and cocktails, Crystal Light can be used to create lighter, diet-friendly versions of classic drinks. For example, it can be mixed with vodka to create a low-calorie version of a fruity martini or with rum for a twist on the traditional mojito. Its use allows for experimentation with different flavors while keeping the overall caloric content of the cocktail lower than usual.