As a mapmaker (cartographer) [GIS now vs. GPS; though we USE GPS] I like anything mappy; things not normally made of maps - shirts, hats, bandannas -I saw SHOES once ! - these envelopes - I LIKE 'em. Saw map stationary before - memo pads of selectable map theme , but THIS is unique with TO and FROM shown as already pointed out. I have an idea for you. but will check out your web site first.