US Marine Corps Martini

5 (1.5 fluid ounce) jiggers vodka

4 (1.5 fluid ounce) jiggers gin

3 cubes ice

2 (1.5 fluid ounce) jiggers pale dry sherry

1 ½ fluid ounces water

Pour vodka, gin, ice cubes, sherry, and water into a glass container and freeze until mix is slushy, at least 3 hours. At the same time, freeze martini glasses.

Pour martinis into glasses, straining out any remaining ice cubes.