More to explore:
Vintage Watering Cans
Metal coffee cans that could be reused to store dry goods, like sugar, flour, beans... You could Modge Podge labels on them for some neat looking canisters!
Cans as vases
The Hankful House: Make flower pots out of paint cans
Decorated pringles cans
Dump A Day Simple Ideas That Are Borderline Crafty - 34 Pics