After you've scooped out the last bit of instant coffee or replenished your 'tea, coffee, sugar' containers, you might typically discard or recycle the empty jar. Yet, these seemingly 'useless' items ...
Claire is Lifehacker's Senior Food Editor. She has a B.S. in chemistry, a decade of food journalism experience, and a deep love for mayonnaise and MSG. Any collector of condiments, spreads, jams, and ...