in the creator's own words (slightly edited for grammar and spelling), from the Craigslist post:
One of a kind Margarita Mixer. Everything custom. Had no plans to follow.
Custom made box with a 5 gallon Igloo cooler on top. BRAND NEW InSinkErator Evolution compact garbage disposal in the wooden box ($179 at Home Depot). Everything on this came from Home Depot.
What it does with a flip of a switch is chops up ice and liquor or non-liquor together to make a margarita or slushie. It mixes everything using the return pipe, running into the top. With a turn of handle the product comes out.
This would be GREAT for tailgate parties, wedding receptions, general parties and family reunions!