I'd have to agree that XTC is really bad; probably the inventor's taste buds had been shot off in the war. Anyway, I think the worst beverage I've had that's "somewhat" available is "VRÜIT". It is absoultely repulsive. It's even worse than Jones Pink.
Always remember... Don't follow the can drinkers to the chicken bone recycling bin!
fruit water. It's this flavored water stuff they sell at the ACME. I thought it would be like meridian clear (a tasty beverage), but it was not sweet, and it tasted like liquid plastic with no fruit flavor at all. Most Diet sodas are pretty bad, too, except maybe that Stewarts "S" stuff. Also, caffeinated water.