I was searching for a new penguin avatar when I came across a machine that makes soda right in your own home
They have three models, and the newest one looks like a penguin (that's why it came up), but it's overpriced just because it's stylish. The others are quite reasonable.
All you do is use your water, the machine will carbonate the water and then you add the soda syrup!!!
The coolest thing is that since the stuff isn't being packaged to last for months on a store shelf it's about 1/8'th the sugar, 1/4'th the calories and 1/30'th of the sodium.