Protien Powder - is there anything you CANT mix it with?

I forgot that you were preop too, but if you can find a way to make the drinks you like without juice, you might be able to continue post op.  I also add protien powder to soy milk, and then I mix it into decaf coffee.  I like it that way, and this winter when you are freezing having lost a layer of insulation, it will be nice to have the warm drink.  Also, after I had sugery, warm drinks were easier for me to get down than cool ones.  

http://www.obesityhelp.com/forums/amos/4019205/protien-shakes/