Are Pop Cans Too Small?

I remember fondly as a kid drinking a can of Coca-Cola everyday for lunch. It wasn't healthy but man was I pumped for recess afterwards. It was like childrens' steroids. The point of this memory is that I would never finish the entire can of coke and would pour about a quarter of the remaining coke down the drain. Now I am an adult and I could probably down 3 or 4 or those same cans without pausing for a breath.