One beer can is too small a thing to change the world. But sometimes a small thing slips into the right gap between technology and an era, and then a chain reaction begins.
In 1959, a strange kind of packaging appeared on store shelves in Colorado: small 7-ounce cans, lined up in rows inside cardboard boxes. The beer inside was familiar — Coors Brewing Company had been making it since the end of the 19th century. The metal was not. Instead of tin-plated steel, which by then had served as the standard material for beer containers for decades, these cans were made entirely of aluminum — a two-piece design developed in-house by a division with the unexpected name Porcelain Division. A brewery’s Porcelain Division designing metal containers sounds like a line from an absurdist novel, but there was engineering logic behind it: the division worked with materials and coatings, and aluminum was a task of the same kind as ceramic glazes.
Why replace steel with aluminum at all? The answer lay far from any environmental manifestos. A steel can with a tin coating gave beer microscopic amounts of iron — enough for Coors chemists to detect a distortion in the taste. Aluminum did not. It was also noticeably lighter: for a brewery operating out of a single plant in Golden, Colorado, and distributing its products across several states, every gram saved on a can translated into tons of fuel saved along the route. Roughly speaking, it was a solution to a logistics problem, packaged in a new alloy. Ecology had not yet become a mass language in 1959 — the first Earth Day was still eleven years away.
Aluminum is the third most abundant element in the Earth’s crust, but extracting it is expensive. Bauxite ore must be refined into alumina, and alumina must be reduced by electrolysis in molten cryolite. The Hall–Héroult process, patented back in 1886, requires monstrous amounts of electricity: producing a ton of primary aluminum devours around 186 gigajoules of energy. That is the equivalent of running a powerful industrial boiler continuously for several days. Historically, aluminum plants were built near cheap hydroelectric stations — not out of love for nature, but because otherwise the metal was not profitable.
And now — the trick that makes this whole story possible. Remelting used aluminum takes roughly 8.3 gigajoules per ton. The difference is that famous 95 percent energy saving, a figure so wildly disproportionate that the first time you encounter it, you want to run the numbers again. But it is true, and the reason is simple: recycling does not require breaking the bond between oxygen and aluminum, which is extraordinarily strong in the oxide. Scrap is already pure metal — all it needs is to be melted at 660 °C and cast again. Its quality is almost entirely preserved: aluminum can be recycled again and again, and the tenth remelt produces material indistinguishable from the first. Steel is recycled too, but impurities accumulate in it faster, and the energy gain is more modest. In that sense, aluminum is a rare case in which a secondary resource is almost identical in its properties to a primary one.
What fascinates me personally is this arithmetic: the can you crush in your hand and toss into a bin contains an enormous energy debt, already paid when it was first produced. Every recycling cycle is a way of not paying that debt again.
The return program was born alongside the can. In that same 1959, company president Bill Coors announced that Coors was ready to buy back its own aluminum cans from consumers — for one cent apiece. The figure seems laughable, but on the scale of consumption it added up to meaningful sums for people who collected cans by the sackful — schoolchildren, Scouts, people without steady incomes. By 1965, around sixty million such cans had been bought back — and this was where reality caught up with the program: there simply was no market for secondary aluminum, recyclers had no need for used containers, and what had been collected over the years sat motionless in warehouses. In 1965–1970, the buyback had to be suspended altogether. Rescue came from the side: when major aluminum companies themselves became interested in can scrap, Coors signed reciprocal contracts with them — supplying secondary metal in volumes equal to the primary aluminum it bought from them — and can scrap had a steady buyer for the first time. In 1970, the program returned under the banner “Cash for Cans”: in its first year, every fourth can came back; in the second, 46 percent did.
Here it is important to resist the temptation to call Coors’s initiative “the first environmental movement” or “the beginning of American recycling.” Scrap-metal collection existed long before beer cans — during both World Wars, citizens were urged to turn in metal for industrial needs, and networks of collection points had operated for decades. America’s modern recycling infrastructure was built up from many layers: municipal programs, federal legislation, investments by recyclers, pressure from environmental organizations, economic incentives for packaging manufacturers. Coors was one voice in that choir, but the choir was not reducible to a single voice.
The late 1960s and early 1970s were a time when America began to notice its own trash. The burning Cuyahoga River in Ohio, the oil spill off the coast of Santa Barbara, the publication of Rachel Carson’s Silent Spring (released back in 1962, but by the end of the decade turned into a political argument) — all of it was forming a new lens. The first Earth Day in 1970 drew millions of participants. Environmental consciousness ceased to be the preserve of naturalists and became a mass mood.
And at that very moment, the aluminum can was already standing onstage — light, gleaming, recognizable and, critically, recyclable with fantastic efficiency. It became something like a textbook illustration of the circular economy: an object everyone held in their hand, threw away without regret — and then encountered again, exactly the same, on a shelf. The cycle — “drank the beer — crushed the can — turned it in — the can is remelted — back on the shelf” — was short and clear enough for a child to explain. Glass bottles were returned too, but glass is heavier, it breaks, and recycling it did not offer such dramatic energy savings. Paper decomposed. Plastic (which would begin its mass invasion of packaging a little later), on the other hand, recycled poorly. The aluminum can landed at the perfect point: common enough to be visible, valuable enough as secondary material for recycling to make economic sense without subsidies.
Was it coincidence or calculation? Neither, in pure form. Coors was solving its own production problems in 1959. The environmental movement in 1970 was looking for clear symbols. The can happened to be there — and was claimed by a new context, like an old building that new tenants make their own.
It would be beautiful to end by saying that the aluminum can closed the loop and the problem was solved. But the honest picture is more complicated. According to the Aluminum Association, in the United States in 2020, 45.2 percent of sold aluminum cans were returned directly by consumers — noticeably below the twenty-year average; under the full industrial measure (including scrap collected by commercial buyback operations and exports), the figure was 59.7 percent. The rate has been declining since the early 2010s. In Europe and Brazil, the numbers are markedly higher — in some countries they exceed 70–80 percent. The difference is not explained by the properties of the metal, but by how collection systems are structured: where deposit systems operate (you pay when you buy and get the money back when you return the can), return rates are sharply higher. Where a can simply enters the general waste stream, a significant portion of the aluminum ends up in landfill — and lies there, essentially forever, because aluminum does not decompose.
It seems to me that this is the central paradox: a material perfectly suited to recycling still gets lost in a system that does not know how to collect it. The energy arithmetic is flawless, the physics is on recycling’s side, the economics are too (remelted aluminum is cheaper than primary aluminum). But between a crushed can on the roadside and a smelting furnace lie human behavior, municipal bureaucracy, and the distance to the nearest collection point.
The story that began with a seven-ounce package from Golden, Colorado, has no final period — it continues every time someone opens a can of beer or soda. Coors long ago ceased to be the only producer of aluminum containers; by the 1970s, virtually the entire beer and soft-drink industry had switched to aluminum. Over the decades, the company itself went through mergers and acquisitions, becoming part of Molson Coors Beverage Company. But that early gesture — a can made of a new metal, bought back for one cent — remained in cultural memory as one of the first instances in which a mass consumer product demonstrated that waste can be a resource.
Aluminum-can collection today is a multibillion-dollar industry. In developing countries, it remains a source of income for millions of informal waste pickers, whose work is economically rational precisely because aluminum is worth money at every stage of its life. The closed loop that Coors accidentally illustrated in the late fifties never became fully closed — but it works well enough to remain the most persuasive example of recycling in the everyday experience of an ordinary person. The average can today is made of roughly three quarters recycled metal, with almost half of that volume coming from old collected cans — and that is perhaps the weightiest legacy of that little seven-ounce cylinder from 1959.