Fairy Food: "Bite No Bit, And Drink No Drop"

"And what you've not to do is this: bite no bit, and drink no drop, however hungry or thirsty you be; drink a drop, or bite a bit while in Elfland you be and never will you see Middle Earth again."
- the Ballad of Childe Rowland

I've previously discussed the food of Fairy in the context of what fairies themselves eat but today I thought it would be interesting to look at humans in relation to