This festive drink is all you need to celebrate the holidays in style.
In a cocktail pitcher, add the lemon-lime soda, the juice of the lemons and the tequila.
Run some lemon rind around the rim of 2 very large margarita glasses. Dip the wet rims in colored sugar (any color) or bar salt.
Add the crushed ice to the glasses, and add the liquid from the pitcher.
For a showy presentation, pour the cranberry juice into the empty pitcher. Present the almost-full glasses to your guests on a tray and pour in the cranberry juice while others watch and drool.