Why not? Everyone and everything is going green so why not green zip bags for your sandwiches? It's a pretty clever idea. Simply put your finished sandwich in the bag, zip it closed, and put it in your lunch carrier. In fact, it's just what you would normally do EXCEPT it now looks like a nasty, moldy sandwich that's been sitting around for a week or two. Only you know it isn't.
Fool your friends -- fool your family -- fool that