Great idea. There's a Bottled Water refilling station right near the Trader Joe's I shop at, and if people are willing to carry their empties to the station, refill their water, and take them home - why wouldn't they do the same for all the other projects they purchase? It really has major potential. I can see how online purchases can work the same way - kind of like the way we used to have milkmen come and deliver milk door to door, and switch out the empties with new bottles of milk. Kudos to you for doing this (I even like the funky diorama you built), and I really hope you succeed!