I drink so much sparkling water that I am buying a 20lb. Carbon-dioxide tank and will be making my own shortly. I go through about 2 cases of Talking Rain a week (though I have had to cut back since we dropped our Costco membership) -- fortunately my current place of work supplies all the free talking rain I can drink (but that job is ending this week - but then so are the 12 hour days, so it is a wash I guess).
For 'drink' drinks, I drink bourbon & coke in the winter and tequila & tonic in the summer.