I stay far away from convenience store food.
An excellent choice, if you ask me. And why? I work at one. Some are alright. You still have to check what your buying. Things like milk and eggs will most likely be good, but some other stuff... not so much. I used to go up and down shelves cleaning the dust off of items, to give you an example. I could go on, but I don't want to make anyone nauseous.
Just wipe off that can of pop before putting it up to your mouth next time. Trust me.