Yes, milk cartons are recyclable, and about 63% of U.S. households currently have access to carton recycling through their curbside program. Both the refrigerated gable-top cartons you grab from the dairy aisle and the shelf-stable boxes used for broth or plant milk can go in your recycling bin, though local rules vary.
Two Types of Milk Cartons, Both Recyclable
The classic peaked carton you pull from the fridge (called a gable-top carton) is made of about 80% paperboard and 20% plastic lining. That thin plastic layer is what keeps the milk from soaking through the paper.
Shelf-stable cartons, the rectangular boxes that sit unrefrigerated on store shelves, have an extra layer. They contain roughly 74% paper, 22% plastic, and 4% aluminum foil. That aluminum acts as a barrier against light and oxygen, which is why the contents don’t need refrigeration. Despite the added complexity, both types are accepted by recycling programs that handle cartons.
How Cartons Get Recycled
Recycling facilities break cartons apart using a process called hydrapulping. The cartons are mixed with water in large industrial blenders that agitate the material until the paper fibers separate from the plastic and aluminum layers. The paper fibers, which make up the bulk of every carton, get pulled out and pressed into new paper products like tissue, paper towel, or writing paper. The leftover plastic and aluminum can be processed into materials used for things like notebooks and garden furniture.
The process is straightforward but does require facilities equipped to handle cartons specifically. Not every paper mill or recycling plant has the setup, which is why acceptance still depends on where you live.
How to Check If Your Area Accepts Cartons
Of the roughly 73% of U.S. households that have any recycling program at all, 86% of those programs now include cartons. So if you already have curbside recycling, the odds are good that cartons are accepted.
The easiest way to confirm is to check your local waste hauler’s website or the list of accepted materials on your recycling bin. You can also search your zip code at recyclecartons.com, which maintains a database of carton-accepting programs across the country. Some communities that don’t offer curbside carton recycling still have drop-off locations that do.
How to Prep a Carton for Recycling
Give the carton a quick rinse before tossing it in the bin. It doesn’t need to be spotless, but getting most of the milk out matters. Food residue left inside cartons can cause microbial growth during storage and transport, and dried-on dairy creates deposits on recycling equipment that reduce the quality of recovered paper fibers. A few seconds of water swished around inside is enough.
After rinsing, flatten the carton to save space in your bin and in the collection truck. Leave any plastic caps or spouts attached. If your carton has a straw (common on small juice boxes, which use the same materials), remove it and throw it in the trash, since loose straws are too small for sorting equipment to handle.
Why Cartons Sometimes End Up in the Trash
The biggest reason recyclable cartons get landfilled isn’t that they can’t be recycled. It’s that people aren’t sure whether they should be, so they throw them away to be safe. That uncertainty is understandable. Cartons look and feel different from cardboard boxes or plastic bottles, and for years many programs didn’t accept them.
Access has expanded significantly in recent years. The Carton Council reported that carton recycling reached 2.5 million additional U.S. households in a recent expansion push, bringing total access to 63% nationally. But gaps remain, particularly in rural areas and smaller municipalities where recycling infrastructure is limited.
Another issue is contamination from food residue. When cartons arrive at recycling facilities still full of spoiled milk, they can compromise the quality of the entire batch of recovered fiber. Residual dairy acts as a substrate for bacteria, and once bales of cartons are compressed for shipping, that liquid can squeeze out and contaminate neighboring materials. Rinsing is a small step that makes a real difference in whether your carton actually gets turned into something new.