If you’ve always wondered how aluminum cans were made, then check out this interesting “How it’s Made” segment. Video after the jump.
…prominent design feature of beverage cans is that they almost invariably have a slightly tapered top and bottom. Under examination, it is seen that the metal on the lid of the can is significantly thicker than the metal on the sides. This means that a great deal of raw materials can be saved by decreasing the diameter of the lid, without significantly decreasing the structural integrity or capacity of the can