Fill

In the game: help fill

Fill a drink container or a bag.

Syntax: fill <drinkcon> [source]
Syntax: fill <container> [object|all.<object>]

FILL works with drink containers and regular containers.

to fill a drink container, stand at a fountain (or other source) and type 'fill <drinkcon>'. You can name the source: 'fill flask puddle'.
to fill a container such as a backpack with items from the ground, type 'fill <container>', or 'fill <container> all.<object>'.
fill also loads quivers with projectiles and fills crafting containers.

You cannot use fill on locked-down containers.