2 parts cold vodka
1 part sangrita
Mix in a double shot glass and drink quickly. Repeat ad nauseum.
Note: Sangrita is a delightful sweet and spicy mixer from Mexico that is generally served with tequila. We drink a lot of vodka, so this seemed a logical progression for us. This particular bottle was left at our house by Jon after a debaucherous cocktail party where everyone brought some interesting liquor and we mixed and matched.
While tequila is delightful with anything sweet, I find that vodka's neutral taste brings out the wonderful spiciness of the sangrita.