Does the preblended stuff already have the alcohol in it and all? I couldn't remember.
Comes of being spoiled by a roommate willing to do all the work. ;-)
Some of 'em do. They'll say on the jug. The ones that do cost $11-15 a bottle, the ones that don't are three or four bucks because it's the tequila that's important.
The Jose Cuervo and Margaritaville premixed are the ones we liked. Also, get some Mike's Hard Lemonade sometime, you'll like that stuff!