Are you talking about the powder? Because I found it got really foamy if I shook it but wasn't bad if I stirred instead. The Dr. Brown's formula pitcher was a lifesaver.
We use Similac Advance and I have to stir it, otherwise I can't stand giving it to him. I had to tell SO not to shake it in the bottles (we are using Dr Brown's bottles and I don't think you're supposed to mix in there anyway). I've seen the pitcher and am about to buy it with one of my Target gift cards.