I can't seem to find enough uses for these rubber cooking bands. They're great for tying up roasts so I don't have to bother trying to figure out proper trussing techniques. But they can also be used for color coding leftovers when I feel particularly organized—or, for that matter, color coding and binding just about anything. You can loop a few together to make a longer band, throw them into the freezer or blast them on heat as high as 600 degrees, and they'll maintain elasticity. Plus, they're made of medical-grade Silicone, so I don't have to worry about ingesting anything bad. Not too shabby for a rubber band.
Architec Stretch Cooking Band, $7.32 for a pack of 20 at amazon.com