Candle jars are the best type of garbage to keep around. You can use them to sort nuts and bolts. You can use them as a resealable grease jar when saving drippings to make your own candles. They can be used for storing dry goods. All in all they hit the double use jackpot.
You can also reuse old food jars to can your next generation of food storage. You just need to clean and sterilize them. YouTube has a great video for this: How to Sterilize and re-use old glass jars for preserves and jam.
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