Shaking cocktails is an essential bartending technique, but what if you don’t have a shaker? Fear not, there are several ways to shake a cocktail without a shaker.

One way to shake a cocktail without a shaker is to use a Boston shaker. This is a two-piece shaker that consists of a glass and a metal cup. To use a Boston shaker, place the glass on a flat surface and place the metal cup on top of the glass. Hold …