Candles: Wax candles burn longer when they're frozen. This is especially good for taper candles, which tend to burn quickly.
Batteries: While freezing alkaline batteries extends their life by only 5 percent, storing nickel-metal hydride batteries in there can boost their life by 90 percent.
Seeds: There's a reason why the Doomsday Vault is located in an icy mountain — many seeds keep longer and germinate better when frozen.
Pantyhose: It may be strange to pull part of your outfit from the freezer, but hosiery is less likely to run when it's stored there.
Other food: In addition to popsicles and frozen pizza, you can also extend the shelf life of popcorn, spices and coffee when you keep them in the freezer.