Food, no, because I have a ton right now. Water, yes. I'm too cheap to go out and buy bottled water, though. Every time I finish a 3-liter bottle of soda, I rinse it out and fill it with tap water. I've got 8 bottles (so far) sitting on top of my dryer. If nothing happens... oh well. I can use them to water my houseplants. Better to be safe than sorry.