Diet RC Cola is caffeine free. I have a box of cans in my fridge, it says it right on the box. See: http://www.dietritecola.com/

Gee, Cheatra I may be wrong here but I don't think Diet Rite Cola and Diet RC Cola are one and the same entity... I concur that Diet Rite Cola is definitely made with Splenda and caffeine free because I drank Diet Rite Cola while I was in Florida but Diet Royal Crown Cola which I think agonycat is referring to actually does contain caffeine according to this website:

http://store.yahoo.com/bevsdirect/2400492.html

Hope this clears up any confusion

Bonnie