Most packaging falls into one of five material categories: paper, plastic, metal, glass, and composites. Of these, metal cans and glass bottles are the most universally recyclable, while plastics and composite packaging vary widely depending on the type and your local program. The recycling symbol on a package doesn’t always mean your community can actually process it.
Paper and Cardboard
Clean cardboard boxes, paperboard (like cereal boxes), newspapers, and office paper are accepted in nearly all curbside recycling programs. Corrugated shipping boxes are among the most valuable materials in the recycling stream. Flatten them before putting them in the bin to save space.
The catch with paper packaging is contamination. Grease, food residue, wax coatings, and wet-strength polymers all make paper harder and more expensive to remanufacture. A pizza box with a grease-soaked bottom is a common example: the clean lid can go in the bin, but the greasy half should go in the trash or compost. Paper cups lined with a thin plastic film (like coffee cups) are rejected by most programs because separating that plastic layer adds cost. Wax-coated butcher paper and frozen food boxes coated for moisture resistance also fall into this category.
A good rule of thumb: if the paper feels waxy, plasticky, or is visibly soiled with food, it probably doesn’t belong in the recycling bin.
Plastics: The Number Doesn’t Mean Recyclable
The small number inside the triangle on a plastic container is a resin identification code, not a recycling promise. The EPA is explicit about this: the symbol “does not necessarily mean it can be collected for recycling in your community.” Which plastics your program accepts depends entirely on local infrastructure and market demand for that resin.
That said, some plastics are far more widely accepted than others:
- #1 (PET): Water bottles, soda bottles, and many clear food containers. This is the most commonly recycled plastic and accepted in most curbside programs.
- #2 (HDPE): Milk jugs, detergent bottles, and shampoo bottles. Also widely accepted and in high demand from recyclers.
- #5 (PP): Yogurt cups, some takeout containers, and bottle caps. Acceptance has grown in recent years but still varies by location.
- #3 (PVC), #6 (polystyrene), and #7 (mixed/other): Rarely accepted in curbside programs. Polystyrene foam (Styrofoam) in particular is rejected by the vast majority of communities.
Shape and size matter as much as the resin type. Recycling facilities use infrared sensors to sort plastics automatically, and items smaller than about two inches (bottle caps on their own, small candy wrappers, utensils) often fall through the sorting screens and end up in the trash anyway. Black plastic is another problem: the carbon-based pigment absorbs all infrared light, making it invisible to sorting machines. That sleek black takeout tray may technically be recyclable plastic, but the facility can’t identify it.
Plastic Film and Flexible Packaging
Plastic bags, shrink wrap, bubble wrap, and the film overwrap on products like paper towels are not accepted in most curbside bins. They jam the sorting equipment at recycling facilities.
Many of these films can be recycled through store drop-off programs instead. Grocery stores and large retailers often have collection bins near the entrance for polyethylene-based films, including grocery bags, bread bags, produce bags, and the plastic wrap around cases of water bottles. Look for the How2Recycle “Store Drop-off” label on packaging to confirm eligibility. The key requirement is that the film is clean and dry.
Metal Cans
Aluminum and steel cans are recycling success stories. Steel packaging has a recycling rate of about 74%, and aluminum beverage cans sit around 50%. Both materials can be recycled indefinitely without losing quality.
Aluminum cans (soda, beer, sparkling water) and steel cans (soup, vegetables, pet food) are accepted in virtually every curbside program. You don’t need to remove labels, and a quick rinse to remove food residue is sufficient. Crushing cans saves space but isn’t required. Aluminum foil and foil trays are also recyclable in many programs, as long as they’re relatively clean.
One thing to watch: aerosol cans are accepted in many programs now, but they should be completely empty first. Small metal items like bottle caps, paperclips, or razor blades are generally too small to sort and can damage equipment.
Glass Bottles and Jars
Glass bottles and jars (for food, beverages, condiments) are recyclable and accepted in many curbside programs, though some communities have shifted to drop-off-only collection because glass is heavy and breaks during transport. If your program accepts glass, you can mix colors together in most cases. Research from Penn State University has shown that different colored bottles can be remelted together without material incompatibility, though some manufacturers still prefer color-separated glass for producing specific shades.
Not all glass is the same, though. Drinking glasses, window panes, mirrors, ceramics, and heat-resistant glass (like Pyrex) are made with different chemical compositions and melting points than container glass. Putting these in the recycling bin contaminates the batch. Stick to food and beverage containers only.
Composite and Multi-Layer Packaging
Some of the trickiest packaging to recycle is made from multiple materials bonded together. Juice boxes and shelf-stable milk cartons (like Tetra Paks) combine layers of paper, plastic, and sometimes aluminum foil. Chip bags often have a metalized film layer. Blister packs combine rigid plastic with cardboard backing.
Carton recycling has expanded in recent years, and many curbside programs now accept them, but access is far from universal. The recycling process requires specialized equipment to separate the layers, which limits where it can happen. Check your local program before tossing cartons in the bin.
Chip bags, candy wrappers, and squeezable pouches (like applesauce pouches) are almost never recyclable through standard channels. If a package combines materials that can’t be easily separated, it’s functionally non-recyclable for most consumers.
How Labels and Adhesives Affect Recyclability
Labels on bottles and cans generally don’t need to be removed before recycling, but they do affect processing costs. The Association of Plastic Recyclers notes that adhesive removal is a significant cost in plastic recycling. Labels that don’t release cleanly from containers, or that use metallic foil, can interfere with the infrared sorting machines that identify what type of plastic a container is made from. As a consumer, you don’t need to peel off every label, but it’s worth knowing that shrink-wrap sleeves covering an entire bottle can make it harder for facilities to sort correctly.
What “Recyclable” Actually Means on a Label
Federal Trade Commission guidelines set a clear standard: a company can only call a package “recyclable” without qualification if at least 60% of consumers have access to facilities that can process it. Below that threshold, the company is required to add language like “may not be recyclable in your area” or even stronger disclaimers if access is very limited. A package’s shape, size, or color can also disqualify it from being marketed as recyclable, even if the raw material itself is technically recyclable.
In practice, the safest approach is to check your local program’s accepted materials list rather than relying on the symbols or claims printed on the packaging itself. Most municipal waste programs publish this list online, and it often takes less than a minute to confirm what goes in the bin and what doesn’t.