Hmmn. Might be a 'special' there. I've lived in a variety of states and I think you can buy each of those things -- 'large' version of the bar -- for 99cents EACH, but I've never seen them together. As for the 60oz drink, that is usually only the kind of price you see when places are using it pull in customers, such as gas station quick-food marts, via tap. Buying it in the bottle is a lot more (~1.25 for a 1 litre bottle, although at the dollar store you can get 4 litres for 99 cents).

The cheapest thing pretending to be food, by far, is dried Ramen noodles. You can get them 10 packages for $1, sometimes more with specials. I had a number of friends who literally lived on those in college as they were poor.

PJ