Pop BigBucket® Container in the refrigerator for the Perfect Margarita on the Rocks, Instantly. Pop BigBucket® Container in the Freezer for a Delightful Frozen Margarita. The Mixer contains Real Lemon Juice, Real Lime Juice and Natural Fruit Oils! Simply adding one 750ml Bottle of Tequila yields nearly One Gallon of Finished Margarita.