I love this idea - and I have a big bite that could easily do this. Tin Can Lanterns for table centerpieces. Cheap, recycled, and easy enough to make. Throw a little heat-proof spray paint and ribbons on them to add a little color.
DIY PROJECT:COFFEE CAN LANTERNS - Instead of setting them up with clamps and wood and stuff I have seen the same thing done where you just fill the can with water and freeze. Which means you then have a good sturdy surface to hammer the designs into.