I was on the road yesterday driving to a county court to defend myself (unsuccessfully) against a speeding ticket. I reluctantly stopped into a convenience store on my way back, to see if there was anything I would eat for lunch.
I actually did find two things that were palatable and not too unhealthy: canned sardines and toasted cashews. The total was $2.50, affordable even for a grad student.
The sardines were canned in "tomato sauce", which I realized later contained soybean oil. Oops. Well I suppose when you get your food at a convenience store, you have to expect such things.
The main thing that bothered me was the trash. I posted a mugshot (above) of the can, fork and plastic bag that I either trashed or recycled as a result of the meal. The total volume of trash was probably almost as much as the total volume of food.
I think if you stick to nuts, canned fish and fresh fruit, it's possible to survive a convenience store stop. And Baby Ruths. Those are healthy, right?