4 large lemons
2 cups white sugar
12 (1.5 fluid ounce) jiggers lemon-flavored vodka
Cut lemons in half and squeeze juice into a 1 gallon sealable pitcher; place lemon halves in it. Add sugar, vodka, and ice; fill pitcher with cold water until half full.
Shake thoroughly until well mixed. Fill pitcher with water until completely full and shake again.