A concept by Harc Lee.
Here's the rationale behind it:
"A convex logo substitutes colorfully sprayed can. Naked can help to reduce air and water pollution occurred in its coloring process. It also reduces energy and effort to separate toxic color paint from aluminum in recycling process. Huge amount of energy and paint required to manufacture colored cans will be saved. Instead of toxic paint, manufacturers process aluminum with a pressing machine that indicates brand identity on surface."