Help Fill

Syntax: fill <container> (<drink source>)
        pour <container> 

By itself, '
fill <container>' will refill a drink container with the first
in-room liquid source available (a fountain, barrel, pitcher, etc.).  If
the drink container in your inventory is not completely empty, you can
create a cocktail mix by filling it with a different liquid type. You may
also use '
fill <container> <source>' to fill from a specific source when
there is more than one in the room.

To empty a container, either '
pour <container>' or 'empty <container>'.

There is also a video which shows how to manipulate drink containers on