Yes — Both Carton Types
Two kinds of cartons are recyclable where programs accept them: gable-top cartons (the peaked refrigerated milk and juice cartons) and aseptic cartons (the shelf-stable boxes for juice, broth, soup and plant milks). According to the Carton Council, about 61% of US households have access to carton recycling. At the mill, cartons are pulped to recover their paper fiber, which becomes tissue, paper towels and building materials.
Paper or Plastic Bin?
Cartons are mostly paper — a gable-top carton is roughly 80% paper and 20% plastic (a thin polyethylene coating), while an aseptic carton averages about 74% paper, 22% plastic and 4% aluminum. But even though they're fiber-based, in a curbside program you just put them in your regular mixed/commingled recycling cart — you don't separate them into a paper-only stream. Don't bag them unless your program specifically says to.
How to Prep a Carton
Three steps: empty any remaining liquid (a quick water rinse helps; no soap needed), keep the cap on or push the straw back in so the small parts get captured instead of becoming litter, and do NOT flatten the carton — its 3D shape helps the optical sorters pick it out correctly. (A few programs ask you to flatten; follow local instructions if they differ.) Check whether your area accepts cartons using the locator at recyclecartons.com.
For a plain-English breakdown of what the numbers and arrows mean, see our guide to recycling symbols and numbers.