7-11 has introduced the Full Throttle Fury Slurpee. Yes, it's an energy drink in slushie form. It's good stuff, Fury is one of only energy drinkable on taste.
I recommend the Scotty method of slushie construction, a little ice and a little bit of soda before fulling the rest of the cup with slushie.
I found the following while researching for this post, Kosher Slurpee?