A flask garter is a garter with a sewn-in pouch that holds a drinking flask. A garter is a fashion device that goes around the leg or upper thigh, which is designed to keep socks or stockings from falling down. During prohibition garters were used to hide alcohol in a discreet location, however, in modern times flask garters are most commonly used as gifts for bachelorette parties.
Flask garters are often decorated with lace and a ribbon, and come in a variety of colors and styles. The lace and ribbon can be a favorite color of the bride-to-be or one of the colors used in the decorations of the bachelorette party. The flask garter serves as a visually appealing gag gift for the bachelorette to celebrate her last night as a single woman, as the flask can be filled with her favorite liquor or any other beverage of her choice.