Compostable plates and cups: certifications, PFAS and local rules

Materials

• Molded fiber: made from plant fiber such as sugarcane (bagasse), bamboo or wheat straw. Stiff and often microwave-friendly. Check the label for limits.
• Paper plates and cups: may be coated to hold liquids. Hot cups are often lined with a plastic or plant-based lining, so a paper cup is not necessarily plastic-free.
• Palm leaf and wood: made from leaves or thin wood. Look at the maker's description.
• Plant-based plastics: sometimes labeled compostable, and may need an industrial facility.

Compostable claims and certification

Compostable usually means a product is designed to break down under composting conditions. Many compostable plates need an industrial composting facility, which some areas do not have. A third-party program, such as the one run by the Biodegradable Products Institute, certifies some products for commercial composting. We describe it in general terms, and do not say that any specific product has it. The FTC's Green Guides ask that compostable claims be clear about where and how the product can be composted. If your area has no facility that takes it, a compostable plate that goes to a landfill does not compost the way the claim suggests.

A word about PFAS

PFAS are a group of chemicals used in some products to make them resist grease and water, and some molded fiber products have contained them. Some states have restricted PFAS in food packaging. If it matters to you, look for a specific statement from the maker, such as a PFAS-free claim, and ask for details if it is not clear. We do not say that any specific product contains or does not contain them.

Our angle: the value depends on your composting access

Before you compare prices, answer one question: where will the plates go? If you have a curbside food-waste program that accepts them, a certified compostable plate has a clear path. If you do not, you pay more for a claim that may not matter. In that case a washable set of plates, or a simple paper plate with recycled content, may be better value for parties. To compare, divide the price by the number of plates or cups, then multiply by how many your typical gathering uses. Compare that cost per event with the cost of renting or borrowing a set of dishes.

1. Check whether a local program accepts compostable plates.
2. Divide the price by the number of items.
3. Multiply by the items you use per event and compare options.

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