David Beierl wrote:
> Just a small consequence of the vast industrial and scientific effort that
> has been put into making aluminum drink cans containing no aluminum --
> they're not there yet but already they've got it so that 3/4 of the
> material is in the cap, and they keep shrinking the cap.

What's really interesting is to compare an aluminum pop can to a juice
can.  The juice cans have to be much thicker because they don't have the
pressure of the carbonated liquid inside to resist crushing during
shipping.  A friend of mine once described a modern pop can as being
like an aluminum balloon, and that's not terribly far off.