A 2021 Health Canada study tested 20 brands of baby bottles and 13 brands of sippy cups, finding that every single one released bisphenol A (BPA) and bisphenol S (BPS) into liquids, regardless of whether they were labeled as BPA-free. The chemicals leached into water and liquids simulating breastmilk, formula, and juice, with higher concentrations appearing in acidic or fatty liquids. This finding raises serious questions about the effectiveness of chemical bans and the safety of so-called "safer" alternatives .

Why Are Babies Particularly Vulnerable to These Chemicals?

Infants and young children face unique risks from chemical exposure that adults do not. Bisphenols are endocrine disruptors, meaning they interfere with the body's hormone systems. Babies have reduced metabolic capabilities compared to adults, which means their bodies cannot process and eliminate these chemicals as efficiently. This leads to bioaccumulation, where chemicals build up in the body over time and can cause greater harm during critical developmental windows .

The vulnerability extends beyond just bottles. Recent research using USEtox modeling, a sophisticated exposure assessment tool, evaluated how young children encounter BPA and its alternatives through multiple pathways. For children ages 3 to 6 years old, the primary exposure routes include direct mouthing of toys, dermal contact with products, and ingestion of household dust containing these chemicals . Teething rings, dolls, and other toys that children frequently put in their mouths emerged as significant sources of exposure in the modeling study.

What Chemicals Are We Actually Talking About?

When manufacturers stopped using BPA in baby products, they didn't eliminate the problem; they simply swapped one bisphenol for another. The Health Canada study found that bottles and sippy cups released not just BPA and BPS, but also bisphenol F (BPF) and bisphenol AF (BPAF). Many of these alternatives carry comparable health risks to the original chemical they replaced, yet they face far less regulatory scrutiny .

The aggregate exposure picture is concerning. When researchers modeled exposure from multiple toys used by young children, bisphenol F resulted in the highest daily exposure dose at 2.6 micrograms per kilogram of body weight per day, while bisphenol AP had the lowest at 0.14 micrograms per kilogram of body weight per day. Over the course of early childhood from 6 months to under 12 years, the estimated aggregate exposure to BPA alone totaled 13.4 milligrams .

How to Reduce Your Child's Chemical Exposure

• Understand the regulatory gap: The FDA has prohibited BPA in baby bottles, sippy cups, and infant formula packaging, but this ban only addresses one chemical. The EU regulates BPA in toys, but the United States has no federal restrictions on bisphenols in toys, though California will prohibit bisphenols in juvenile feeding and teething products by 2026 .
• Recognize that "BPA-free" labels are misleading: Products marketed as BPA-free often contain alternative bisphenols like BPS or BPF that may pose similar health risks. The Health Canada study demonstrated that bottles labeled as BPA-free still released these chemicals into food and beverages .
• Minimize mouthing exposure: Since direct mouthing is a primary exposure pathway for young children, regularly inspect toys for signs of wear, damage, or degradation that could increase chemical leaching. Wash toys frequently and supervise play with items designed for mouthing .
• Reduce dust ingestion: Household dust can contain bisphenols from degraded plastic products. Regular vacuuming with HEPA filters and damp dusting can help minimize this non-dietary exposure route .
• Choose material alternatives when possible: While the sources do not recommend specific brands, they note that material substitutes like natural materials or different types of plastics may reduce chemical exposure compared to polycarbonate plastics and epoxy resins that contain bisphenols .

Why Are Regulations Failing to Protect Children?

Despite Canada banning BPA in baby bottles and sippy cups years ago, the Health Canada study found that bottles and cups sold in Canada continued to leach BPA long after the ban took effect. This regulatory failure stems from a fundamental flaw in how chemical safety is approached. When one bisphenol is banned, manufacturers simply substitute another without waiting for comprehensive safety data on the replacement .

The United States faces an even larger gap. While the FDA prohibits BPA in baby bottles, sippy cups, and infant formula packaging, no federal law restricts bisphenols in toys, despite evidence that toys are a significant source of exposure for young children. The Interstate Chemicals Clearinghouse database contains 62 records of BPA in toys currently sold in the United States . Only the European Union has established migration limits for BPA in toys intended for children under 36 months or toys designed to be placed in the mouth.

The challenge is compounded by limited hazard and exposure data on BPA alternatives. While chemical substitutes like bisphenol S, bisphenol F, and biomass-based alternatives have entered the market, their safety profiles remain poorly understood compared to BPA itself. This creates a situation where parents cannot easily identify which products are genuinely safer and which simply shift the risk to a different chemical .

What Does the Science Tell Us About Health Risks?

BPA is a well-established endocrine disruptor linked to reproductive and developmental effects, metabolic diseases, and other health concerns in epidemiological studies. Children are particularly vulnerable because their organs are still developing, they have higher metabolic rates relative to body weight, and their behavior patterns like mouthing toys create unique exposure pathways . The concern is not limited to acute toxicity but rather to long-lasting adverse health impacts from exposure during critical developmental windows.

The exposure modeling study identified dominant pathways that vary depending on the specific chemical and toy type. For some bisphenols, dermal contact and mouthing dominate exposure, while for others, dust ingestion plays a larger role. This variability underscores why a one-size-fits-all regulatory approach fails to protect children adequately .

Moving forward, policymakers and manufacturers face a choice: continue the cycle of banning individual chemicals while allowing substitutes with unknown safety profiles, or implement comprehensive restrictions on entire chemical classes and require robust safety data before new alternatives enter the market. Until that happens, parents navigating product choices face significant uncertainty about which feeding and play products truly minimize chemical exposure.