Recycling Symbol Decoder

The numbers (1 through 7) inside the recycling triangle are Resin Identification Codes (RICs) established by the Society of the Plastics Industry (SPI) in 1988. They identify the type of plastic resin used to manufacture the product. These codes help recycling facilities sort plastics efficiently, as different resins have different melting points, chemical properties, and recycling processes. Importantly, the symbol itself does not guarantee that the item is recyclable in your local area — it simply tells you what type of plastic it is made from.

#1 (PET) and #2 (HDPE) are the most widely recycled plastics globally. #5 (PP) is increasingly accepted by curbside programs. #4 (LDPE) can be recycled at many grocery store drop-off locations (plastic bags and films). #3 (PVC), #6 (PS), and #7 (Other) are rarely recycled due to technical challenges, contamination risks, and limited market demand for the recycled material. Always check with your local recycling program for specific guidelines, as acceptance varies significantly by municipality.

#1 (PET) is generally considered safe for single-use food and beverage containers, though it should not be reused or exposed to high heat. #2 (HDPE) and #5 (PP) are considered the safest plastics for food storage — they are chemically stable and do not leach harmful chemicals under normal conditions. #4 (LDPE) is also relatively safe. #3 (PVC) contains phthalates and chlorine and should be avoided for food contact. #6 (PS) can leach styrene, especially when heated. #7 (Other) is a mixed category — some #7 plastics (like polycarbonate) may contain BPA, while others (like bio-based PLA) are safer. When in doubt, choose glass, stainless steel, or BPA-free products for food and beverages.

No. The recycling symbol with a number is not a guarantee that the item will be recycled. It is merely a material identification code. Whether an item actually gets recycled depends on your local recycling facility's capabilities, current market demand for that resin type, contamination levels, and the economic viability of processing that material. Many plastics with recycling symbols still end up in landfills or incinerators. This is sometimes called "wishcycling" — placing items in recycling bins hoping they'll be recycled when they actually cannot be processed by local facilities.

BPA (Bisphenol A) is an industrial chemical used to make certain polycarbonate plastics and epoxy resins. It is most commonly found in #7 (Other) category plastics, specifically polycarbonate (often marked as "PC" near the recycling symbol). BPA can leach into food and beverages, especially when containers are heated or damaged. BPA is an endocrine disruptor linked to various health concerns. Plastics #1, #2, #4, and #5 are generally BPA-free. Many manufacturers now produce BPA-free products, particularly for food and baby items, but always check product labels for confirmation.

If a plastic item lacks a resin code, you can try these identification methods: Float test: #2, #4, and #5 float in water; #1, #3, #6, and most #7 sink. Burn test (with caution): different plastics produce different flame colors, smoke, and odors when burned. Appearance and flexibility: #1 is clear and rigid; #2 is typically opaque and waxy; #4 is flexible and stretchy; #5 is semi-rigid with a high melting point; #6 is rigid but brittle and snaps easily. However, the safest approach is to check manufacturer information or contact the brand directly.

Yes. PLA (Polylactic Acid), a bio-based plastic made from corn starch or sugarcane, falls under the #7 (Other) category and is often marked with "PLA" beneath the triangle. While PLA is industrially compostable, it requires specific high-temperature facilities — it will not break down in home compost or landfills. PLA also cannot be recycled with conventional plastics and can contaminate recycling streams if mixed in. Always check local composting and recycling capabilities before disposing of PLA products.