R.B.
I don't know about the slushy magic... but a couple years ago I bought a slushie machine at WalMart for I think $10-15.
The funnel slushie cups were only a couple of dollars ( if you wanted them, or just use a regular cup) for a lot of them.
The flavors weren't very much either, they lasted a long time... little goes a long way! Then for the past two years the slushie flavors went on clearance for .50 and we stocked up after the first year to make it through the second year and did the same thing last year and we still have 5 bottles in the pantry. The have a 2 yr experation date still.
Just another thought to the slushy magic... might be cheaper to do it this way. It just wont have the name.