The plastic-free world runs on a mix of solid science, decades-old habits, and marketing copy. Sorting them apart changes what you buy. Here are the claims we hear most, graded honestly.

Myth 1: “BPA-free means it’s safe”

False, and it’s the most important myth on this list.

When BPA became toxic to sales, manufacturers swapped in closely related bisphenols — BPS, BPF, and others — that share its core chemistry. Studies that have looked find several substitutes show similar estrogenic activity; one widely cited 2011 study found that most plastic products tested, including BPA-free ones, leached estrogenically active chemicals, especially after stress like heat or UV.

“BPA-free” tells you one specific molecule is absent. It tells you nothing about what replaced it. This pattern even has a name in the literature: regrettable substitution. Treat the label as marketing, not clearance.

Myth 2: “It’s food-grade plastic, so nothing gets into the food”

False. “Food-grade” means migration into food stays under regulatory limits set per-chemical — it does not mean zero migration, and it can’t account for chemicals regulators haven’t assessed. A single plastic product can contain hundreds of intentionally and non-intentionally added substances, most of which have never been individually evaluated for food-contact migration. Food-grade is a floor, not a guarantee.

Myth 3: “Silicone is just another plastic”

Mostly false, with caveats. Silicone is a synthetic polymer, but its backbone is silicon–oxygen rather than carbon–carbon, it contains no bisphenols or phthalates, and it’s far more heat-stable. That’s why we track it as its own class rather than lumping it in with plastic.

The caveats: low-quality silicone can be bulked with fillers (the pinch-test folklore — white showing through when twisted — is a rough tell, not proof), and at high heat silicone can release volatile siloxanes, which is why quality manufacturers post-cure bakeware. A silicone gasket on a jar lid is a very different exposure than silicone bakeware at 230°C. Some readers accept silicone seals, some don’t — that’s exactly why our silicone-only rating exists.

Myth 4: “Stainless steel leaches nickel, so it’s just as bad”

Overblown. Stainless does release small amounts of nickel and chromium, mostly when new and with acidic food, and it’s a real issue for people with nickel allergy. But the quantities are tiny, drop after the first uses, and nickel is not an endocrine disruptor — it’s not comparable to plastic leaching in kind or degree. If it worries you, cook acidic sauces in enamel or glass and move on. This myth mostly shows up as whataboutism in comment sections.

Myth 5: “The plastic is outside the food path, so it doesn’t matter”

Often true, sometimes false — check the steam. A plastic housing or handle genuinely doesn’t touch your food, which is why our ratings distinguish no-contact plastic from contact. But watch two sneaky paths: condensation (steam hits a plastic lid, drips back into the pot) and hot-fill (the “cold water only” reservoir that gets hot anyway during brewing). Our component tables flag steam/incidental contact separately for exactly this reason.

Myth 6: “A ‘plastic-free’ label means the product is plastic-free”

Unreliable. There’s no regulated definition. In practice the label often means plastic-free packaging, or “no visible plastic” while the gasket, valve, or internal tubing is plastic. The recurring offenders we find: lid seals, one-way valves, internal water lines in anything electric, and coatings. This gap is roughly half the reason this site exists — the only way to know is a component-by-component teardown, which is what our product pages do.

Myth 7: “Heating plastic once in a while is fine; it takes years to matter”

The direction is right, the complacency isn’t. Leaching is dose-y: occasional exposure beats daily exposure. But heat is the single biggest accelerant we know of — one study found polypropylene baby bottles released dramatically more microparticles when hot water was used, exactly as the bottles are designed to be used. “Once in a while” for an item you use every morning is a rounding error of self-deception. Prioritize the daily hot stuff; genuinely relax about the occasional cold stuff.

Myth 8: “You have to replace everything at once”

False, and counterproductive. Tossing working items to buy a whole plastic-free kitchen in one weekend is expensive, wasteful, and unnecessary — exposure is dominated by a few high-heat, high-frequency items. Swap the coffee maker, the kettle, whatever touches hot or fatty food daily; replace the rest as it wears out. (Our take on prioritization is in why plastic-free matters.)

How to use this

The pattern across every myth: labels and vibes are unreliable in both directions. “BPA-free” and “plastic-free” overpromise; “silicone is plastic” and “steel is just as bad” overcorrect. The only durable heuristic is the one this site is built on — look at each component, what it’s made of, whether food touches it, and whether it’s hot when it does.