Yeah, I got one.

I used to make Margaritas in the blender. Not too bad, but the ice chips were uneven and would sometimes clog the straw. Then I bought my wife one of
these. That's right, I bought it for her! Stop laughing! Now! Hey, I heard that snicker, Liz, knock it off!
Anyway, it makes great Margaritas. The true secret is to use enough tequila. Don't even think about pouring it in your gas tank!
The best mix I've been able to find is
Island Oasis.