I used to use ZippFizz that I got from Sam's Club. It worked really great but was around $18.00 for 20 tubes and only came in orange, grape and assorted fruit flavors (which was more expensive). I started using the Nuun tablets and they work just as good and my LBS has almost all of their flavors in stock. I have been trying several of the flavors and so far like the Lemon Tea the best. They are running me around $7.00 for 12 tablets. I've seen them advertised at other LBSs for a little less, but I would make it up in the drive to get them.