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Glass or Plastic? Home Food Storage and Safety Basics

By on May 25, 2015
Glass or Plastic? Home Food Storage and Safety Basics

Purchasing and preparing food involves using a variety of different storage containers. Plastic is a common material for food storage. Some consumers prefer to avoid plastic food containers, instead choosing glass containers to hold food products in the pantry, refrigerator, and freezer. As you explore your options for home food storage, consider the benefits and risks of various materials to determine what you wish to use to keep food fresh. You may decide that glass would be an improvement over plastic storage containers.

The Code on the Bottom

Plastic containers feature a triangular mark on the bottom surface. The outer triangle is made up of arrows. Inside this triangle, you will see a numeric code ranging between one and seven. The number shown on the bottom of a plastic container indicates the type of plastic used to produce the item. Some types of plastic are recyclable, and other types are not. You can base some of your purchase decisions on the code on plastic containers, because this code will tell you whether you can recycle the plastic and whether the plastic is rated for food storage.

Expiration Dates on Prepackaged Products

Prepackaged food products usually feature an expiration date on the bottom of the container. While the FDA does not require bottled water manufacturers to provide an expiration date for their products, many of these manufacturers have voluntarily added expiration dates to inform consumers about recommended use periods for optimal quality of the bottled water. Consumers should generally avoid using prepackaged foods that have expired, because these products may not be safe to consume. Expired foods may not have the same nutrient content as stated on food labels.

  • Bottled Water Regulation and the FDA - The FDA shares bottled water regulations, including the voluntary date stamps on the bottoms of the bottles.
  • Bottled Water: Questions and Answers - The Minnesota Department of Health advises consumers that expiration dates that may appear on water bottles are voluntarily added by producers.
  • Shelf-Stable Food Safety - The U.S. Department of Agriculture provides data about the times for shelf-stable foods.
  • Still Tasty - Browse the various food categories to learn how long various foods will remain safe to eat.

What is BPA & Why is it Dangerous?

Bisphenol A is a chemical present in some types of plastic. It's possible that BPA present in plastic and some metal food containers may transfer to the foods and beverages stored in the containers. Health experts are researching possible adverse health effects from BPA, including brain issues, fetal development problems, and undesired symptoms in children. Consumers wishing to limit exposure to BPA can select food products in BPA-free containers. Using BPA-free food storage containers in the home is another way to limit BPA exposure.

  • Bisphenol A (BPA) - Explore information about BPA, including where it occurs and potential health effects from this chemical.
  • Bisphenol A (BPA) Fact Sheet - The Centers for Disease Control and Prevention provide a comprehensive fact sheet about BPA.
  • Bisphenol A Overview - Learn how people may be exposed to BPA with information presented by the New York State Department of Health.
  • Bisphenol A (BPA) Action Plan Summary - The U.S. Environmental Protection Agency shares an outline of planned actions for managing the risks associated with BPA.

Microwaving & Heating

Food manufacturers have designed some packaging for specific use in the microwave. These containers must have a special marking or designation that indicates "microwave safe" design. Food containers that do not indicate microwave safety may not be safe to use in the microwave due to the potential for melting and warping from heat. If melting occurs, chemicals in the plastic could transfer to foods.

Refrigerating & Freezing

Storing food in plastic containers is generally safe for both refrigeration and freezing. Experts recommend that consumers should always wrap foods tightly or place food into storage containers that match the amount of food. For example, filling a container halfway with food and freezing may lead to freezer burn due to excess unused space in the container. Never place food into plastic containers or bags that are not designed for food storage due to the potential for chemicals transferring into the food.

How to Recycle

Recycling helps prevent glass and plastic food containers from reaching landfills. Most communities offer curbside pickup for recyclables to make it easy for consumers to recycle. Check the codes on the bottoms of plastic containers to determine whether the items are recyclable. Some plastics are always recyclable, whereas other types of plastics may or may not be recyclable in your community. Check with your local municipality regarding the types of plastics you can recycle.

The Benefits of Glass Containers

One storage strategy involves the use of glass containers in the kitchen. Glass does not have the potential for chemicals transferring into food, making it an optimal food storage option. You can also reuse glass containers for an inexpensive food storage method. When you are ready to recycle glass containers, this process is often more environmentally friendly due to fewer chemicals produced during recycling.

  • Selection of Food Containers: Glass Jars (PDF) - Food processing specialists provide an overview of glass jars as food storage containers.
  • Food Packaging - Penn State Extension shares information about reusing glass containers for food storage.
  • Food Storage Containers - The National Resources Defense Council advises consumers about some dangers with using plastic containers and also explains the benefits of using glass for food storage.

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