We've gotten really good at designing aluminum cans
When aluminum was first used to make beverage cans in 1965, it took around 55 pounds of metal to make 1,000 cans. Today those same 1,000 cans weigh less than 35 pounds because we've gotten so much better at designing them. Aluminum replaced steel and tin cans and was prized for being highly malleable. It has the added benefit of being really easy to recycle; it can be reused indefinitely.