Sodastream. We use it all the time. No-waste seltzer and the ginger ale mix is really good after you get used to it (one or two glasses is all it took us).
I was there, at that announcement in 1996. It was the only time I saw Steve Jobs speak. His cult was pretty much not a cult then, and it was pretty hard to understand what he was talking about, but of course a short time afterward we were all talking about and building db-backed websites (and my career was based on it for a long time). The prescience was always there.
Sam, I know you guys support nonprofit startups. But do you donate? Does YCombinator have a program for supporting nonprofits by the traditional means (ie giving them money), or is that something you do as individuals only, not as a company?
East, by Meera Sodha, an extremely good cookbook.