For food storage, the greenest, healthiest and most energy-efficient choice is glass. Glass storage containers retain cold better than other materials (such as plastic), and the colder your containers are, the less the refrigerator and freezer have to work to maintain a cool temperature. Plus, glass containers don't absorb odors or stains, so they don't transfer smells to other foods when you use them repeatedly. Many manufacturers are making glass storage containers with tight-fitting lids, which means you can use them in the freezer, as to-go containers and in the microwave.
ANDREWS MCMEEL SYNDICATION