Walk into any baby store and you'll see "BPA-Free" labels everywhere. It sounds reassuring. But here's what manufacturers don't tell you: the chemicals replacing BPA might be just as harmful—and we have even less research on them.
What Is BPA and Why Did We Ban It?
BPA (bisphenol A) is a chemical used to make hard, clear plastics and epoxy resins. For decades, it was the standard material for baby bottles, sippy cups, and food containers.
The problem: BPA is an endocrine disruptor. It mimics estrogen in the body, interfering with hormone function. Studies linked BPA exposure to early puberty in girls, reproductive issues, behavioral problems, and increased cancer risk.
In 2012, the FDA banned BPA in baby bottles and sippy cups. Many manufacturers voluntarily removed it from all food-contact products.
Parents celebrated. "BPA-Free" became a marketing win.
But here's what happened next: Companies replaced BPA with chemically similar alternatives—and didn't tell anyone what those alternatives were.
Meet the BPA Replacements
When BPA was banned, manufacturers needed substitutes that could do the same job: make plastic hard, clear, and heat-resistant. The most common BPA alternatives:
BPS (Bisphenol S)
A close chemical cousin of BPA. Used in "BPA-Free" plastics, thermal receipt paper, and canned food linings.
The research: A 2013 study found that BPS has similar hormone-disrupting effects as BPA. In some cases, BPS was more potent at disrupting estrogen activity than BPA. A 2018 study on zebrafish found that BPS exposure caused reproductive abnormalities and developmental issues at levels similar to BPA.
The concern: We banned BPA for being an endocrine disruptor, then replaced it with another endocrine disruptor.
BPF (Bisphenol F)
Another bisphenol variant used in epoxy resins and plastics.
The research: A 2012 study found BPF has estrogenic activity similar to BPA. Animal studies show it can affect thyroid hormone regulation and reproductive health.
The kicker: BPF is often found alongside BPA in products. Even "BPA-Free" items can contain trace amounts of BPF.
Tritan (Copolyester)
Eastman Chemical Company's proprietary BPA-free plastic. Marketed as "safer" and used in many baby bottles, water bottles, and food containers.
The controversy: In 2011, a study claimed Tritan had no estrogenic activity. But an independent study found that Tritan did leach chemicals with estrogenic activity—especially after UV exposure or dishwashing. Eastman sued and won in court, arguing the independent testing was flawed. Where does that leave parents? Unclear. Independent researchers say more study is needed.
Polypropylene (PP)
A softer plastic (recycling code #5) used in many baby bottles, yogurt containers, and bottle caps.
The upside: Polypropylene doesn't contain bisphenols.
The downside: Polypropylene sheds microplastics when heated. A 2020 study found that polypropylene baby bottles release millions of microplastic particles when used to prepare formula.
The "Regrettable Substitution" Problem
Here's the pattern we keep seeing:
- A chemical is widely used for decades
- Research eventually shows it's harmful
- Regulators ban it
- Industry replaces it with a similar chemical
- We discover years later that the replacement is also harmful
This is called regrettable substitution. Because proving a chemical is safe takes decades, manufacturers use new chemicals immediately. By the time research catches up, millions of people have already been exposed.
"BPA-Free" Is a Marketing Claim, Not a Safety Guarantee
When you see "BPA-Free" on a product, it only tells you this product doesn't contain bisphenol A. It DOESN'T tell you:
- What chemical replaced BPA
- Whether that replacement is safer
- Whether the product contains other bisphenols (BPS, BPF, BPB, BPAF)
- Whether the product releases microplastics
- Whether the product contains phthalates, flame retardants, or other additives
"BPA-Free" is not the same as "non-toxic."
The Bigger Issue: We're Focused on the Wrong Question
Parents ask: "Is this plastic BPA-free?" The better question is: "Why am I using plastic at all?"
Plastic isn't just BPA. It's thousands of chemicals. Even "clean" plastic has problems with microplastic shedding, chemical migration, and degradation over time. The only way to avoid plastic's risks entirely is to not use plastic.
What Should Parents Use Instead?
Glass
- Pros: Inert (doesn't leach chemicals), non-porous (doesn't absorb odors), heat-resistant, doesn't degrade.
- Cons: Can break if dropped, heavier than plastic.
- Important: Make sure the entire bottle is plastic-free. Many "glass bottles" still have plastic collars, vents, or caps.
Stainless Steel
- Pros: Durable (won't break), lightweight, no chemical leaching.
- Cons: Can't see through it, can dent, some stainless bottles have plastic linings.
Food-Grade Silicone
- Pros: Flexible, unbreakable, heat-resistant, doesn't contain BPA, phthalates, or PVC.
- Cons: Some silicone bottles still have plastic screw rings or caps, can be expensive, may retain odors if not cleaned properly.
Best option: A bottle where nothing plastic touches the milk. Glass body + silicone nipple-collar + silicone cap = zero plastic contact.
How to Identify BPA Alternatives in Products You Already Own
Look for recycling codes on the bottom of plastic items:
- #1 (PET/PETE) & #2 (HDPE): Generally BPA-free but #1 is not intended for reuse.
- #3 (PVC): Avoid. Contains phthalates and other harmful chemicals.
- #4 (LDPE): Generally considered safer, but still plastic.
- #5 (PP - Polypropylene): BPA-free but sheds microplastics.
- #6 (PS - Polystyrene): Avoid. Can leach styrene.
- #7 (Other): Catch-all category. May contain BPA, BPS, or polycarbonate. Avoid unless labeled "BPA-Free" and made from safer materials like Tritan.
What You Can Do Right Now
- Stop trusting "BPA-Free" as a safety label. It's not enough.
- Avoid heating plastic. Heat accelerates chemical leaching and microplastic release.
- Don't reuse single-use plastics. Plastic degrades with every use.
- Replace old plastic bottles. Plastic used for 6+ months sheds more chemicals and microplastics.
- Switch to glass or stainless steel when possible. Choose materials that don't leach.
- Read labels carefully. Look for full material transparency.
The Uncomfortable Truth
We don't know if BPA-free plastics are safe long-term. We didn't know BPA was harmful for 50 years. We might not know about BPS, BPF, or Tritan for another 20. Do you want to be part of that experiment?
Glass has been used for food and drink since 1500 BC. We know it doesn't leach. We know it doesn't degrade. We know it's safe.
Our Position: No Plastic Means No Guessing
We didn't want to guess which plastic was "safe enough." So we eliminated plastic entirely. Our bottles are made from borosilicate glass and food-grade silicone. No mystery chemicals. Just materials that have been proven safe for generations.
