It was thus said that the Great FBA once stated:
Essentially, this means that 1 Litre of pure water
weighs 1Kg and is
where the basic units came from.
1 Litre will also fit quite nicely in a cube 10cm a side.
At 4 degrees Celcius at sea level, don't forget.
-spc (Atmospheric presure is measured in millibars, right?)