Tantalus' Manacles

Origin
Tantalus was a Greek mythological figure famous for his eternal punishment in the underworld of Tartarus for serving his son as a banquet to the gods. He was made to stand in a pool of water beneath a fruit tree with low branches, with the fruit ever eluding his grasp, and the water always receding before he could take a drink. Cursed with nutritional deprivation and satisfaction, the word tantalize sprung forth, meaning temptation without satisfaction.

Effects
Causes food and drink to turn to ash in the mouth, offering no nutritional benefit, but prevents the wearer from dying of starvation or thirst.