It'll sell well, probably.
For as gullible/naive/pathetic as much of our society is, I can't believe this hasn't already swept the nation.
One effective "drink" strategy I've implemented when dieting is to mix Splenda or Stevia in about 18 oz. of water. You may also flavor it to your liking with other calorie-less sources like lemon, lime, etc. Even Crystal Lite is good on occasion. Drink this simple concoction over several minutes. The volume of water will expand and activate the stretch receptors in the stomach, providing the physical feeling of fullness, while the sweetness satiates the taste buds and brain. It doesn't sound like much, but it works quite well for most people who are in a deprived state of serious dieting. The feeling doesn't last long, but if it helps you get by to your next feeding...
This is a healthy, effective tool for achieving and tolerating calorie restriction.
Unfortunately, human hippos require Pepsi in some form.