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What really happens to plastic drink bottles you toss in your recycling bin
The infinite, triangular loop of arrows that we know as the recycling symbol adorns millions of plastic pop and water bottles we carefully sort in the blue bin. It comforts us with the idea that each one will be recycled over and over again forever.
But unfortunately, most of the time, it’s a lie.
Many bottles aren’t recycled at all, and those that do get recycled usually aren’t turned into other bottles or recycled again after that.
Instead, they end up in the world’s landfills — or worse, in the ocean. In Canada, plastic bottles and caps were the top plastic trash items collected during shoreline cleanups in 2019, just behind cigarette butts. They’re also typically among the top three items in shoreline cleanups worldwide.
That’s led some people to question why drinks are still sold in single-use plastic bottles at all.
Here’s a closer look at what actually happens to those bottles after use and what needs to happen to boost recycling in the future.
How recyclable are plastic drink bottles?
The plastic used to make water and pop bottles is polyethylene terephthalate or PET, which is also known as No. 1 plastic. The number is its “resin code,” which often appears in a triangle that resembles the recycling symbol. It’s technically one of the most recyclable plastics in use today.
While many plastics degrade in quality when recycled and can only be recycled once or a handful of times, “PET is the one plastic you can recycle over and over again,” says Michael Schedler, a plastic recycling consultant who has worked in the industry for decades.
One company that makes bottles from 100 per cent recycled PET, Ontario-based Ice River Springs Water Co., even claims they’re “infinitely” recyclable using its recycling process.
How much is actually collected for recycling?
In Canada, where most communities have blue box programs that accept PET, there was a 79 per cent recovery rate for PET bottles and jars in 2015, says a 2017 study commissioned by the Continuous Improvement Fund. The fund is supported by Ontario municipalities and Stewardship Ontario, a non-profit recycling organization funded by manufacturers.
That’s not bad, but bottles and jars aren’t the only things made from PET — so are grocery store clamshell containers for things like berries and muffins, known in the industry as “thermoforms.” Those make up only a fraction of PET products, but have a recovery rate of just 11 per cent.
It’s also worth noting that Canada represents a fraction of plastic bottles sold in North America, and the recovery rate is much lower in the U.S. — just 29 per cent in of plastic bottles were recycled the U.S. in 2017, according to the National Association of PET Container Resources.
Does all plastic collected for recycling get recycled?
Not necessarily, especially when it comes to waste collected at a business or institution rather than from someone’s home, as CBC’s Marketplace showed in an investigation last September.
Watch the episode to find out what the investigative team discovered:
What does recycling PET involve?
Plastic bottles collected in your blue bin are typically sent to recycling plants called materials recovery facilities that sort them from other recyclables and package them into bales.
Bales of recovered PET are typically purchased by five Canadian “reclamation” plants that wash them, grind them up, and sell the recycled PET or rPET.
What happens to the recycled PET?
Nearly half of Canada’s recycled PET in 2015 was sold to the U.S. as “fibre,” which means it gets turned into things like carpets, stuffings for pillows and futons and the occasional fleece sweater.
“Fibre has always been the largest application for recycled PET,” says Michael Schedler, the Vermont-based plastic recycling consultant who produced the report for the CIF.
But some recycled PET did get turned into packaging — about 30 per cent was used in bottles and about 12 per cent in clamshell containers. Some other recycled PET is turned into plastic straps that hold bundles of goods together or into plastic film or sheets.
Why is most PET turned into fibre, not bottles?
The PET used in bottles generally needs to be clear, colourless and free of contaminants from things like labels. For other applications, those things don’t matter as much.
In fact, that’s one argument that’s been used by the beverage industry as to why they shouldn’t increase the recycled content in their bottles.
“Bottle-to-bottle recycling uses more energy and financial resources to sufficiently clean material to meet quality and safety specifications than is required by carpet and fibre applications,” wrote Joan Archer, then president of the Minnesota Drink Association in a 2001 opinion piece.
Because a higher grade of PET is needed for food and beverage containers, it tends to be more expensive.
Can recycled PET be recycled again?
In the case of bottles, yes.
But once the it’s turned into carpets or pillows, it’s probably destined for the landfill.
On the other hand, Schedler notes that such items have quite a long lifespan compared to a plastic water bottle.
On average, how much of drink bottles is recycled plastic?
The average recycled content of PET bottles in Canada was only 19 per cent in 2015, Schedler’s study found.
Worldwide, bottles contain even less recycled content on average. Nestle, Coca-Cola and and Pepsi all average less than 12 per cent recycled content in their beverage bottles.