I personally do have the RTD shake for breakfast so I use some in my coffee and drink some...but I have also just kept an open one in the fridge and used a splash each morning and then had my regular pacekt, I really didn't think it made any difference in my loss for the little bit I was using that way either. I have regular coffee, not decaf (what's the point?)

and then drink extra water. I also have a cup of (decaf so I can sleep!) Chai tea at night with a splenda in it just because I like the flavor!