Nope... never tried that, but I think a few have here... I also think there's a post somewhere about drink mixes to change things up a bit... something about rootbeer floats and dreamcycles...
I haven't really mixed mine with anything but cinnamon in my strawberry banana gelatin... it was yummy though... someone also told me they tried the orange concentrate heated up with cinnamon and it was a nice warm drink...
You might try asking your center if they have any samples available so you wouldn't have to try a whole box, ... sometimes I think there's a "trade" basket where you can bring what doesn't work and trade for different varieties. That's the worst part ... getting stuck with something that you don't like. So far, I've been pretty lucky with the exception of the peach mango... to me it takes like penicillian