Riddle: 4/13-4/19

Last week's riddle was:
"A man is found dead in the middle of the desert with nothing but a straw in his hands. What happened?"
Answer: "He was in a hot air balloon with some friends, but the balloon could only hold two people. So they drew straws to see who would jump out."

This week's riddle is:
"Food will help me survive, but water will kill me. What am I?"