In 1938, DuPont introduced nylon to the American public. It was billed as a miracle material - stronger than silk, cheaper than cotton, infinitely moldable. Within a year, it had replaced the boar-hair bristles on toothbrushes that had been standard since the 15th century. The modern toothbrush was born: polypropylene handle, nylon bristles, mass-produced at a cost of pennies.
It is now 2025. Your toothbrush is still made of polypropylene and nylon.
In those same 87 years, we redesigned the car, the airplane, the telephone, the camera, the television, the hospital, and very nearly everything else that touches daily human life. The toothbrush got a rubber grip. Some of them vibrate now.
This is worth examining, because the reason the toothbrush hasn't changed is not that it couldn't. It's that it didn't have to.
The economics of disposability
The global toothbrush market generates roughly $5 billion annually. The dominant players - Oral-B, Colgate, Philips - sell on volume and brand inertia. The average American buys four toothbrushes a year. That's approximately 1.2 billion toothbrushes discarded in the United States alone, every year. None of them recyclable through standard municipal programs. All of them destined for landfill, where they will remain, structurally intact, for four centuries.
The business model depends on this cycle. A toothbrush that lasted longer, or that was made from a material with a different end-of-life profile, would require rethinking manufacturing, supply chains, retail pricing, and the fundamental premise that what you put in your mouth every morning is a commodity item with no meaningful differentiation.
Nobody in a position to change this had a financial incentive to do so. So nothing changed.
What good design would have required
Industrial designers talk about the concept of "cradle-to-grave" thinking - the idea that a well-designed object should account not just for its useful life but for what happens to it afterward. Most consumer products fail this test. The toothbrush fails it catastrophically.
A well-designed toothbrush would be made from a material that can return to the earth or the supply chain after use. It would not require a petrochemical manufacturing process. Its bristles would not shed synthetic microfibers into the mouth and digestive system of the person using it. It would be functional, comfortable, and genuinely better - not superficially differentiated through color choices and ergonomic rubberized handles that don't change the underlying material reality at all.
Bamboo checks every one of those boxes. It is one of the fastest-growing plants on the planet - some species add three feet of height per day - requiring no pesticides, no irrigation beyond rainfall, and no replanting after harvest because it regenerates from its own root system. Its tensile strength exceeds that of many steel alloys by weight. It has been used for construction, textiles, and tools for thousands of years across Asia and South America. And when a bamboo toothbrush handle is composted, it is gone in two to six months.
None of this is new technology. Bamboo was here before nylon. The choice to use nylon was not made because it was better for the person brushing their teeth or the world they lived in. It was made because it was cheaper to manufacture at industrial scale in 1938, and nobody has revisited the question seriously since.
Why this matters beyond the bathroom
The toothbrush is a useful case study in a pattern that repeats across consumer goods: an early industrial-era material choice, made under circumstances that no longer exist, calcified into a standard that benefits manufacturers more than users, and never reconsidered because reconsidering it costs money and the people bearing the downstream costs - human health, environmental degradation - are diffuse and unorganized.
The plastic straw had its cultural moment of reckoning. The plastic bag is being legislated out of existence in many jurisdictions. The plastic bottle is under increasing regulatory pressure in Europe. The plastic toothbrush, which you put directly against your gum tissue twice a day for your entire life, has largely escaped this scrutiny.
It shouldn't. And increasingly, it isn't.
The shift is happening slowly, through small companies willing to use different materials and customers willing to think twice about an object they've used without thinking for decades. It won't be a revolution. It will be the same thing it always is: individual decisions, accumulated at scale, eventually making the status quo look like what it is.
An 87-year-old design choice. Long overdue for reconsideration.