For those times, there are Freezer Door Cocktails--batch cocktails of your favorite drinks that are built directly in the bottle and kept on your freezer door to be ready when you are.

The premise couldn't be simpler: Pour off enough of a standard liquor bottle to create just enough space to add the other ingredients needed to produce a full bottle of your desired cocktail. Store the bottle in the freezer and you have chilled cocktails ready whenever the mood strikes. That means a Negroni in hand before you even have a chance to loosen your tie or take off your heels.

This fun, creative collection of 75 ready-to-pour beverages will walk readers through making freezer door versions of their favorite cocktails, from Negronis, Margaritas and Manhattans to Cosmopolitans, Espresso Martinis and Gin & Tonics. Organized by primary liquor, Freezer Door Cocktails also covers the science behind the simplicity, including how the freezing point of alcohol changes based on volume of water, juice, and/or sweetener added, as well as how to use this information to craft your own recipes.