This article will help to explain what each number means and why these codes matter. For recycling purposes, it helps to identify and sort. And for safety, as some plastics (especially 3, 6, and certain 7s) are more likely to release chemicals when heated or worn.
It will also help to determine which codes to use, how to use and why. As in:
1, 2, 4, 5. Best for food.
3, 6, 7. Use sparingly for food.
When in doubt, choose glass or stainless steel for storage.
Have you ever wondered what the numbers on the bottom of food containers mean and how safe the plastic is? Well, here is the breakdown (most health experts agree on this list for health and safety reason – but there are a few health specialist that have their own opinions). The numbers on the bottom of plastic food and storage containers are “resin identification codes – RIC codes”. These codes identify what type of plastic the item is made from, and if it can be recycled (in your area) and whether it’s considered safe to use for food.
- 1. PET or PETE — Polyethylene Terephthalate: Most commonly used in water bottles, soda bottles, and many food containers. Generally safe for single use and usually very recyclable. But these can easily absorb odors and bacteria if reused.
- 2. HDPE — High-Density Polyethylene: Commonly used for milk jugs, detergent bottles, and some food containers. These are considered one of the safest plastics and also widely recyclable.
- 3. PVC — Polyvinyl Chloride: This kind of RIC is found in pipes, some food wraps, and blister packaging and can contain chemicals that can leach. These are not commonly recyclable and should be avoided for food use when possible.
- 4. LDPE — Low-Density Polyethylene: These are usually used for grocery bags, bread bags, squeezable bottles and are considered safe for food. Depending on your area, these are sometimes recyclable.
- 5. PP — Polypropylene: Widely found in yogurt cups, takeout containers, and many reusable food containers. Considered generally safe for hot foods and microwaving and are becoming increasingly recyclable.
- 6. PS — Polystyrene (Styrofoam): These containers are used for foam cups, takeout clamshells, and packing peanuts. They can leach styrene, especially when heated. Rarely recyclable and best to avoid for food or reuse.
- 7. Other/Mixed Plastics: These include polycarbonate, bioplastics, and blends. Safety varies widely. Often not recyclable. Some types (like older polycarbonate) may leach BPA.
