I don't know how I lived without this for so long.
Basically, it's just a CO2 tank, some fitted bottles, and some flavor syrup (they have A LOT of variety, from very light flavoring for "Italian soda," to pretty much any soda you can think of).
1.) The diet cola tastes exactly like Diet Coke.
2.) Having cold sparkling water available at all times is awesome.
3.) No more carrying bottles or cans from the supermarket.
4.) No more recycling 800,000,000 bottles.
5.) Probably save a few dollars, but even if it's a push, it's worth doing for 1-4.
http://www.sodastreamusa.com/
Anyone else have one of these? I would think some of you Al Gore types would jump all over this.
At the very least, you could use the empties for urination while grinding.