Recycle Symbols Guide — What Each Recycling Symbol Means

Published May 7, 2026

You see them on water bottles, cereal boxes, shampoo containers, and shopping bags — those little triangles with numbers inside. But what do they actually mean? Not all recycling symbols are created equal, and tossing the wrong plastic in your recycling bin can contaminate an entire batch. Understanding these symbols is the first step toward recycling correctly and reducing your environmental footprint.

This guide breaks down every recycling symbol, explains which plastics are actually recyclable, and clarifies what those eco-friendly labels on your products really mean.

The Universal Recycling Symbol

The Mobius loop — three chasing arrows forming a triangle — is the universal symbol for recycling. It was designed in 1970 by Gary Anderson, a 23-year-old college student, for a contest held by the Container Corporation of America. The symbol indicates that a material is recyclable, but it does not guarantee that your local recycling program accepts it.

Plastic Recycling Numbers 1-7

The Resin Identification Code (RIC) system assigns a number from 1 to 7 inside the recycling triangle to identify the type of plastic resin used. This system was introduced by the Plastics Industry Association in 1988. Here is what each number means:

#1 — PET or PETE (Polyethylene Terephthalate)

PET is the most commonly recycled plastic. It is used for water bottles, soda bottles, salad dressing containers, and peanut butter jars. It is widely accepted by curbside recycling programs and can be recycled into fleece clothing, carpet fibers, and new containers. PET is generally considered safe for single use but should not be reused repeatedly as it can break down over time.

#2 — HDPE (High-Density Polyethylene)

HDPE is a versatile, durable plastic found in milk jugs, detergent bottles, shampoo containers, and grocery bags. It is widely recyclable and one of the safest plastics. Recycled HDPE becomes pens, fencing, lumber, and drainage pipes. Most curbside programs accept HDPE containers.

#3 — PVC (Polyvinyl Chloride)

PVC is used in pipes, window frames, vinyl flooring, and some cling wraps. It is difficult to recycle and rarely accepted by curbside programs. PVC can release toxic chemicals when burned or heated, making it one of the least environmentally friendly plastics. Avoid it when possible.

#4 — LDPE (Low-Density Polyethylene)

LDPE is found in squeeze bottles, bread bags, produce bags, and some food wraps. While technically recyclable, many curbside programs do not accept LDPE because it is lightweight and can jam sorting machines. Many grocery stores accept LDPE bags for recycling through special collection bins.

#5 — PP (Polypropylene)

Polypropylene is used for yogurt cups, bottle caps, straws, and microwavable containers. It has a high melting point and is increasingly accepted by recycling programs. PP is considered one of the safer plastics and is growing in recyclability as more facilities add the capability to process it.

#6 — PS (Polystyrene)

Polystyrene appears as rigid plastic (CD cases, disposable cups) or foam (Styrofoam takeout containers, packing peanuts). It is very difficult to recycle and not accepted by most curbside programs. Polystyrene can leach styrene, a possible carcinogen, especially when heated. Many cities have banned foam food containers for this reason.

#7 — Other (Miscellaneous Plastics)

This catch-all category includes polycarbonate, nylon, ABS, and bioplastics. Some #7 plastics contain BPA (bisphenol A), a chemical linked to health concerns. Others are new bioplastics that claim to be compostable. The recyclability of #7 plastics varies enormously, so check with your local program. This category also includes mixed or layered plastics that are essentially non-recyclable.

Other Eco Symbols You Should Know

The Green Dot

The Green Dot symbol — two intertwined arrows forming a circle — does NOT mean the product is recyclable. It indicates that the manufacturer has made a financial contribution to a packaging recovery organization, primarily in European countries. Many people confuse this with the recycling symbol, but it is actually about funding recycling infrastructure, not about the recyclability of the item itself.

Compostable Symbol

The compostable symbol shows a seedling or plant growing. Products bearing this mark have been certified to break down completely in commercial composting facilities within a specific timeframe. Note that "compostable" and "biodegradable" are not the same thing — biodegradable simply means the material will eventually break down, but it could take decades.

Forest Stewardship Council (FSC)

The FSC tick-tree logo on paper and wood products indicates the material comes from responsibly managed forests. This is one of the most trusted eco-certifications in the world. When you see this symbol, it means the product meets strict environmental and social standards throughout its supply chain.

Energy Star

The Energy Star symbol on appliances and electronics indicates the product meets energy efficiency standards set by the U.S. Environmental Protection Agency. Energy Star-certified products use less energy, save money on utility bills, and help reduce greenhouse gas emissions.

Copy Paste Recycle and Eco Symbols

Here is a collection of recycling and environmental symbols you can copy for your projects:

Quick Reference: Which Plastics Can You Recycle?

Here is a simple guide to help you decide what goes in the recycling bin:

• Almost always accepted: #1 PET, #2 HDPE
• Often accepted: #5 PP (check locally)
• Sometimes accepted: #4 LDPE (store drop-off, not curbside)
• Rarely accepted: #3 PVC, #6 PS (Styrofoam)
• Varies widely: #7 Other (check the specific material)

When in doubt, check with your local recycling provider. Putting non-recyclable items in the bin (known as "wish-cycling") does more harm than good — it can contaminate recyclable materials and increase processing costs.

Final Thoughts

Understanding recycling symbols empowers you to make better decisions for the environment. Remember: the chasing arrows symbol means a material is technically recyclable, but your local program determines what they actually accept. When in doubt, throw it out (of the recycling bin) — it is better to send something to landfill than contaminate an entire recycling load.

Reducing and reusing always beat recycling. But when you do recycle, knowing these symbols helps you do it right. For more symbol guides, check out our hazard warning symbols guide to understand the safety labels on household chemicals, or our element symbols guide for the periodic table notation used in materials science.