Hi. I love, love, love the Isopure zero carb bottles of Protein.
40G of protein for a 20 oz bottle. 160 calories. My favorite is Grape Frost. It is different tasting than the shakes. Give it a shot. A tad expensive, but hey, if it help you get your protein in, it is worth it right???
Good luck and let me know how you are doing.
Terry