You know the bin. You know the symbol. You've probably heard the three R's, reduce, reuse, recycle, so many times they stopped registering as instructions and became background noise. We were taught to rinse the jar, flatten the box, and drop it in without asking many more questions than that. Recycling became a reflex before it ever became a fact.

But "recyclable" doesn't mean recycled. A symbol on a package means a material can theoretically be processed somewhere. Not that it will be, not that your city collects it, and not that doing so is even good math once you factor in energy and transport. That gap between the promise on the label and what actually happens after the truck pulls away is where this series, Sustainability Deep Dive, lives. Each post takes one thing we've all absorbed as common knowledge, recycling, "biodegradable," carbon neutral, eco-friendly materials, and checks it against what's actually true.

We're a packaging and product design studio, so this isn't idle curiosity. Every material we spec ends up in someone's version of that bin, and we'd rather choose it with real numbers than with the vague good feeling a recycling symbol is designed to give you. We're starting where the habit starts.

So what does "recycling" actually mean?

At its simplest, recycling is a four-step relay most of us only ever see the first leg of. Your bin gets collected and taken to a Materials Recovery Facility, or MRF. There it's sorted: machines, magnets, and often still people, separating everything by material. This is where a lot of otherwise-recyclable stuff quietly falls out of the system. What survives gets reprocessed, melted, pulped, or shredded back into a raw material. Then comes remanufacture, where that material gets sold back into the supply chain and turned into something new. Sometimes the same product. Often, especially with plastic, something lower-grade instead.

That last step is the one that matters most. Some materials, like glass and metal, can go through this loop over and over with no real change to their structure. Others degrade a little more each time. The material itself gets weaker, or breaks down at a molecular level, until it can't be processed into anything useful and drops out of the loop for good.

We didn't want to take any of that on faith, so a while back we went out to Sunset Park, Brooklyn to see the Sims Municipal Recycling facility for ourselves. It's a $110 million MRF that now handles all the metal, glass, and plastic (and half the paper) collected across all five boroughs of NYC. Even the building practices what it preaches: built largely from recycled steel, sitting four feet above city flood regulations, and it stayed dry through Hurricane Sandy while running partly on its own wind turbine and solar array.

Inside, the recyclables travel roughly 2.5 miles along two mirrored conveyor belts, sorted by trommel screens, optical sensors, and magnets. And still, at the very end, people stand at the line pulling out whatever the machines miss — mostly plastic bags and shrink-wrapped bottles, both of which trip up the optical sensors and get tossed as contamination.

Containers and packaging aren't a side issue here, either. The EPA estimates they made up 28.1% of everything the US threw away in 2018, or 82.2 million tons. So what does recycling actually look like once you break that down by material?

Metal is the closest thing to a clean win.

Recycling steel instead of making it from raw ore saves about 72% of the energy and cuts water use by 40%, according to a metals recycling factsheet from the European circular economy platform. Aluminum does even better: recycling a ton takes only about 5% of the energy primary production does, saving nearly nine tons of bauxite ore per ton recovered. Both metals can be melted down and reformed indefinitely with no real loss of quality, which the Aluminum Association points to as a reason more than 80% of US aluminum production already comes from recycled material.

Glass is a more complicated version of the same story.

It's also, in theory, infinitely recyclable. The energy savings, though, are smaller than most people assume even at high cullet rates, research from the National Renewable Energy Laboratory puts savings around 13%, with other estimates from the University of Minnesota ranging up to 30%. The bigger opportunity, per that same NREL research, isn't recycling glass at all — it's reusing it; refillable bottles cut energy use per use by a factor of ten or more. And glass's actual recovery rate lags its potential: the EPA puts US glass recycling at 31%, and even its newer infrastructure estimate only reaches 41% — well behind Europe's 75% average and countries like Austria, which top 85% thanks to deposit return schemes.

Paper and cardboard are the system's quiet success story

In 2018, corrugated cardboard was the largest single category of municipal solid waste in the US, with 33.3 million tons generated. It was also the most recycled. Of the 33.9 million tons of paper and paperboard recycled that year, 32.1 million tons were corrugated boxes. That works out to a 96.5% recycling rate for cardboard specifically, according to the EPA.

A milk carton or a cereal box tells a different story, though. Strip corrugated out of the paper and paperboard packaging category and the EPA's own material-specific data puts the recycling rate at just 20.8%. Most of that material gets collected and processed as mixed paper rather than sorted by type, and it's a smaller, messier stream than cardboard to begin with.

What makes cardboard the exception is mostly logistics. There's a lot of it, and much of it is relatively clean and easy to collect. Businesses generate it in large, predictable volumes rather than it arriving mixed in with food waste and other household material, which makes it easier to sort and process. Cardboard is basically doing for paper what aluminum does for metal. It's the one part of the category where recycling actually delivers close to what the symbol promises.

Plastic is where the promise breaks down hardest.

The EPA calls PET (soda bottles) and HDPE (milk jugs) "widely recycled," language that sounds like a guarantee but isn't. In an eye-opening 2023 New York Times opinion piece, journalist Oliver Franklin-Wallis reported that the real recovery rate for those two plastics is closer to 30%, and that polypropylene (No. 5, used in furniture and cleaning bottles) was reprocessed at just 2.7% as of 2018. Across every plastic type, the National Academies of Sciences puts the US rate at around 10%. What does get collected usually isn't looped back into the same product anyway — according to both Our World in Data and PIRG, most plastics survive only one or two passes before the polymer degrades too far to be useful, so a milk jug typically comes back as carpet fiber, not another milk jug. A downcycle, not a cycle.

None of this is a uniquely American failure, either. The EPA puts the US recycling rate at about 32% of its waste overall — trailing figures reported for the UK (44%), Germany (48%), and South Korea (58%) — a gap that's mostly about infrastructure and policy, not the materials themselves. The same aluminum can, the same glass jar, performs very differently depending on which country's bin it lands in.

We think there’s room for another R: Reconsider.

None of this argues against recycling. It argues for designing packaging around what materials actually do once they leave someone's hands, instead of what a chasing-arrows symbol implies. A glass jar deserves a spec that keeps it pure enough to stay in the loop. A can benefits from being all-aluminum, not a mixed-material hybrid that can't be separated. A plastic component is worth asking, honestly, whether it needs to exist at all, because "recyclable" and "will actually get recycled into something useful" are two very different claims.

Our founder Stuart puts it simply: there should really be a fourth R added to the original three, Reconsider. For us, that's not a slogan, it's the actual job. Reconsidering a material, a closure, a shape before it ships is design work, not an afterthought bolted on once the product's already decided.

That's the thread we'll be pulling on for the rest of this series, sorting fact from marketing on one sustainability claim at a time.