M saw in the Berkeley Parents Network advice emails a thread about making your own soda water to reduce the number of plastic bottles. I will definitely have to look into this once we've moved. It sounds like you buy CO
In looking for ways to green my life, I'm trying to start with the worst offenders. The first thing to minimize the non-recyclable and non-compostable trash. Soda bottles are recyclable, so they would be lower priority, but if this also saves us money (this stuff adds up and we are addicted to it), then it may be an early move. I'll post the details when I have a plan.