Auto-Feeder

Description
Auto-Feeder is an upgrade for the Power Armor Head that will eat consumables in your inventory automatically. Use the Tinker Table to adjust how effective it is. Lower levels of effectiveness will eat more food to keep you constantly at 100%. Higher efficiency will eat food only when it's maximum benefit (e.g. all 4 health slots for steak) can be achieved.

WARNING: The Auto-Feeder mod will consume "(Filled) Tin Can" when necessary, but will not return an empty can that can be refilled as eating it manually would.

Source(s)
http://machinemuse.net