I just bought some packets. Basically they are protein powders that you add water too, but they aren't just boring shakes.
I bought some that are soups, some that are hot chocolate, some that are fruit drinks.
I haven't tasted them yet, but each packet provides 15 grams protein, nearly no fat and low carb, and only 70-80 calories.
The protein comes from different sources depending on what product you are getting. Some is milk proteins (hot chocolate), some are whey (fruit drinks) and some are soy (tomato/basil soup).
I was about to post this thread asking whether anyone heard of them and I googled them and found out that they only seem to be located local to me, but I might be wrong. Anyway, someone I know is using their weight loss system and I gave her some money and asked her to buy some of these protein packets for me as they only cost about $1.25 each, so it was pretty reasonable.
http://www.metabolicweightlosssolutions.com/index.html
Again, I am not promoting the above company, as I haven't even tasted the stuff I bought yet, but I was wondering whether anyone else heard of this product or other products like this since the variety of a high protein soup broth or chilled fruit drink sounds pretty darn cool.