PROTEIN DRINK FOAM
 I've noticed that if I add ice to my protein drinks that I make in the blender thingie, that I dont get much foam on it.  If you like colder drinks, this helps.  Also I add frozen fruit & splenda to them in place of the ice when I am wanting sweets or ice cream.  They can get thick like a shake and satisfy my cravings because it is just like the and texture of ice cream.  If you like them on the thin side...just add more milk.  I actually use soy milk though with a large splash of half and half for the extra creamy taste not to mention a few extra grams of protein. 
