Not all cocktails are created equal.

Some need a vigorous shaking with ice to ensure that components like juice, cream, or egg whites are properly chilled and blended with the booze. Others call for no mixing at all, with distinct layers of liquor serving as a hallmark to the final product.

Still others, though – such as the Old Fashioned, the Martini, and the Manhattan – fall happily somewhere in the middle, their ingredients requiring little more than a gentle swirl over ice to emerge cool, diluted, and combined into an expertly mixed drink. And it’s those that this bar-ready kit’s meant to perfect.