What possesses someone to look at the liquor cabinet one day and say, "Hey, let's float a frozen margarita in a pool of alcohol and splash some more alcohol on top of the whole thing"? The onset of dementia, perhaps, or a deep and abiding desire to test the limits of inebriation. Whatever, the folks at Ciudad managed to create a best-of-all-worlds margarita. Some people appreciate the tart bite of the traditional cocktail. Others prefer the less potent sweetness of the frozen variety. A few opt for gimmick versions mixed with Midori or other liqueurs. Well, the bellybutton combines all three into a concoction capable of smacking you with brain freeze, clouding your mind with alcohol and tricking your taste buds into demanding several more rounds--all at the same time. Good luck finding the door.