This map envelope concept looks certainly possible and undeniably cool. Basically all you need to do is print one out a map, and make sure that it can be folded nicely into an envelope. The best part is, you can use it instead of a post card, and have an envelope with the print out of wherever you are at the moment. You might want to make sure that the recipient doesn’t use a letter opener to slice through it though, or they’ll lose the all important-location bubble. If you’ve got some free time over the weekend, maybe it’s time to give snail mail a try again, and see how it goes.