What are the 7 types of plastics?

The 7 Types of Plastics You Should Know

Not all plastics are created equal. In fact, there are seven main types, each with unique properties and uses. Understanding them can help you make smarter choices—especially when it comes to recycling and safety.

Polyethylene Terephthalate (PET or PETE) is the most common. You’ll find it in water bottles, soda containers, and food packaging. It’s lightweight and recyclable, but best used once—repeated use can lead to degradation and chemical leaching. Next is High-Density Polyethylene (HDPE), known for its strength and resistance. Milk jugs, detergent bottles, and grocery bags are often made from HDPE. It’s highly recyclable and doesn’t leach chemicals easily, making it one of the safer options. Then there’s Polyvinyl Chloride (PVC or Vinyl), a tough, versatile plastic used in pipes, shower curtains, and even some children's toys. Unfortunately, it can release harmful chemicals, especially when heated or disposed of improperly. Low-Density Polyethylene (LDPE) is softer and more flexible. You’ll see it in plastic wraps, bread bags, and squeezable bottles. While not as commonly recycled, it’s relatively safe for food contact. Polypropylene (PP) stands up well to heat, making it ideal for microwave-safe containers, yogurt cups, and bottle caps. It's becoming more accepted in recycling programs, though availability varies by location. Polystyrene (PS), often known as Styrofoam, is lightweight but problematic. Used in disposable cups, takeout boxes, and packing peanuts, it breaks down slowly and can leach harmful substances when heated. Finally, the catch-all category: Other. This includes polycarbonate, acrylic, and bioplastics, often marked with a "7." Some contain BPA or other chemicals of concern—so check labels and use with caution. Knowing these types empowers you to reduce waste, avoid risks, and recycle more effectively.