 If you don't like it, you don't want to throw away gallons of this stuff. You want to make just a small couple pints at the most, if possible. Yeah. Since I carbonate with actual yeast, usually I kind of have to go with a gallon. But then again, yeast is relatively cheap. I can always use bread yeast, too, while I'm in the experimentation phase. It's about the cheapest yeast you can find, and it'll work. It'll carbonate things. In fact, it's really good at carbonating things. That's why it works for bread.