I've been saving up our aluminium cans to use them for a few different wedding projects. The first thing I'm using them for is pop can roses.
The metal roses are made pretty much the same way as the giant paper flowers we made for Promdemonium last year.
First I clean off the cans and remove some of the paint, then I trace and cut out the heart shaped petals before bending and attaching them to a wire stem. I get about 1 flower per can and while it does take some time, it's a good way to keep my fingers busy while we're enjoying netflix.