Here's 77g of sugar. More than 1/3 cup, a little less than 1/2 cup.
I'm not a perfect eater, so I opened up the cupboard to see what comps we had for 77g of sugar. You could have 23 mints. This is not a strong start to support my bias - mints are pure sugar, but still 23 mints!
You could eat a roll of peanut butter sandwich Girl Scout cookies, but you'll have to give one away.
Personally, I'd go with 2 1/2 cups of Prairie Farms Moose Tracks Ice cream. This isn't the low sugar, low flavor garbage either. We only had 1 1/2 cups; Microsoft Paint to the rescue!
Husband, Father, Educator, Baseball Simulation Champ, Runner, Super-Forecaster, and Pseudo-Chef