This command allows you to empty one container into another. It optionally
allows you to specify an object name, in which case it'll empty all items
with that name from one container to another.
EMPTY <from container> <to container>
EMPTY <from container> <to container> <object name>
EMPTY bag hole - moves all items in the bag into the hole
EMPTY bag jar potion - moves all potions from the bag to the jar
Note that all normal container capacity restrictions still apply.