After I had my RNY in 2000, I was told that I could drink DIET soda with ice. Supposedly the ice is supposed to cut down on the carbonation. Everything I've read from everyone else here though suggests that we shouldn't drink soda at all. The carbonation in soda may cause the pouch to stretch. When I had my upper GI in a few months ago it showed that my pouch was "normal" but my stoma was stretched out to 3 cm. I don't know if drinking soda had anything to do with it or not, but if I could do it all over again, I wouldn't drink it.