can lah

Learned something interesting in Mechanics of Material lecture this morning.

manufacturers of aluminum cans exercise the same attention and precision as do makers of the metal in an aircraft wing. The engineers who press the design of cans toward perfection apply the same analytical methods used for space vehicles.
...
Such a can, whose wall surfaces are thinner than two pages from this magazine, withstands more than 90 pounds of pressure per square inch--three times the pressure in an automobile tire.

-- September 1994; Scientific American Magazine;
by Hosford, Duncan

Wow, so it's actually a piece of precision engineering~
To the aunties who collect cans: must appreciate hor!
(actually I have a humble collection of Coca-Cola cans...)