The most recent worst soft drink I ever tried was Mountain Dew Super Nova. After about six teeth-gritting swallows, I poured it down the sink. That was enough for me.
Worst soft drink ever. Hands down it is Moxie. I made myself drink 48 cans of that stuff in a two-week period, trying desperately to like it. It never got any better. Can’t say I didn’t try.
But hold on! I just thought of a worse one! RC’s Diet-Rite Cola. I tried it back in 1966–that’s 45 years ago–and I haven’t ever forgotten that wretched taste yet.