Bas Van Der Veer won a prize this weekend for this combination rain collector and watering can.
The setup presumably connects to a house's gutter system, storing rainfall it for the next uh, not-rainy day. It's gorgeous but I think it should be made out of metal, not fiberglass, if he is going for maximum green points. You can probably cut a line in your own rain gutters and hack together a collector on your own, though. I award the idea, not the actual hardware, a thumbs up. [Designboom]