Ioun Stone of Sustenance
This iridescent spindle lessens your need for rest and removes your body’s base needs for air and nourishment.
Head Slot 225,000 gp
You do not need to eat, drink, or breathe. In addition, when you take an extended rest, you do so in half the normal time.
Published in Adventurer's Vault, page(s) 144, Mordenkainen's Magnificent Emporium, page(s) 70.