whoa you found a 12-pack of Tab?! I can only find 6-packs around here. The flavor is cinnamon-y cola sort of thing. But it *is* a diet drink, it was the original Diet Coke. Pepsi had a weird diet beverage prior to Diet Pepsi, it was called Pepsi Light and had a hint of lemon in it. I guess they put extra flavors in there to make up for the lack of actual sugar. They're using aspartame now instead of saccharin but somehow Tab doesn't seem to have the disturbing aftertaste I get from diet coke or other diet sodas.
Another weird 70s beverage that is still around is Fresca. I do not know what Fresca is supposed to taste like, but it's a lemon-lime sort of thing, but diet, but it's nothing like diet Sprite or Diet 7-up. I don't know how to describe it, but I'm not keen on citrus beverages anyway.
This reply would have been a lot funnier if it just sed "j00 momma".