Margarita machine

A margarita machine is a margarita dispensing device. A margarita mix, traditionally lime flavored, is put in a refrigerated container with a spinning agitator. The user is able to dispense margaritas from such a device for extended periods of time, usually up to 12 hours, without losing any quality in the taste of the margaritas. A margarita machine may be purchased in its finished form or built from cooler with special equipment.

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Wikipedia