while (!$mug->empty())
      {
      slurp($mug;)
      }
[download]

A question - is the slurp method of the coffee class greedy?

As well, if the coffee in question is the lovely greek or turkish kind, I would recommend that the while loop should be modified to be :

     {
      slurp(chomp($mug))
     }
[download]

to avoid slurping the "mud" at the bottom.

Macaffine-lair