Calma Breastmilk Bottle
The Medela Calma Breastmilk Bottle is designed to mimic natural breastfeeding, allowing the baby to control the milk flow. It features an air-vent system to help prevent gassiness.
How scores are calculated
Materials (40%): How plastic-free the product is — raw materials, construction, and coatings.
Packaging (20%): Is the product packaged in plastic? Is it recyclable?
Transparency (20%): Does the brand disclose ingredients, sourcing, and manufacturing?
Durability (20%): How long does it last? Longer-lasting products reduce plastic waste over time.
This is a rating of this specific product only — not the company. Other products from this brand may score differently.
Last updated: April 4, 2026
Made from BPA-free plastic and silicone. While designed to support breastfeeding, it is still a plastic product.
Why We Rated It This Way
Medela's Calma Breastmilk Bottle is made from BPA-free plastic bottle, silicone nipple. Certifications: BPA-free.
Chemical & Health Analysis
Each chemical of concern is broken down below — what it is, where it comes from in this product, what it does to the body, and who is most at risk.
Various plastic chemicals
Medela Calma Breastmilk Bottle
Potential for microplastic exposure from plastic bottle and silicone nipple. Some concerns raised about marketing claims and potential choking hazards.
All health claims are based on published, peer-reviewed research from the NIH, WHO, IARC, and peer-reviewed journals. This information is for educational purposes and does not constitute medical advice.
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