A drawn and ironed can having a generally cylindrical side wall and an integral bottom including two annular rims is provided. The bottom of the can has a reduced volume configuration, wherein the upright can rests on an outer annular rim known as the heel, and an expanded volume configuration,...http://www.google.es/patents/US5730314?utm_source=gb-gplus-sharePatente US5730314 - Controlled growth can with two configurations
