As serious as a heart attack! There's an "inventor-type-guy" Mark Kirkland who has patented the "Canwich" concept, hoping to sell them in vending machines and the like. I have many concerns about this idea, but think that if I saw one in a vending machine and my only other choices were candies, crackers and nuts.........................................................I'd still go for the nuts, sorry. I've searched it out a little, but can't find any more of a visual that what is pictured on the can. I suppose if I had to feed a five year old, a Canwich would be an option. I'm guessing once you open the can the sandwich is really small and packaged in a see-through bag of sorts. Not very appetizing. All I can think of are rashions.
The Candwich recently got national attention after a Utah man was sued by the SEC for fraudulently investing millions of dollars in Mark One Foods, the company the produces the Candwich, in addition to several other such products.
I'm sticking with what I know for sure about a sandwich. Keep um fresh and clean, take them with you almost anywhere, and be creative. Don't try to fix what ain't broke!