Does the material of a water bottle (PET vs glass vs other plastics) affect how many hormone-disrupting chemicals leach into the water?
Caution. Plastic bottle material, water source, and even shelf time determine how many endocrine-disrupting chemicals contaminate bottled water. Glass is the lowest-risk option.
What's actually in it
Bottled water isn't just water. The bottle it comes in contributes chemicals. PET (polyethylene terephthalate) plastic bottles can leach antimony, phthalates, and other compounds. Other plastics like polycarbonate release BPA. Glass releases essentially nothing.
How much leaches depends on: the plastic type, how long the water has been sitting, whether the bottle was stored in heat (like a hot car or warehouse), and the water's acidity.
What the research says
A 2026 study in Anal Chim Acta developed a sensitive method to measure multiple classes of endocrine-disrupting chemicals simultaneously in bottled water. Testing different bottle materials showed that bottle material was a significant factor in EDC contamination levels. Price didn't predict safety — expensive brands in plastic bottles weren't safer than cheaper ones. Water source mattered less than packaging material.
The chemicals detected included phthalates, bisphenols, benzophenones, and other compounds that disrupt hormones at very low concentrations.
Drink water from glass bottles or a certified home filter system. If you use plastic bottles, never leave them in hot cars or sunlight. Never reuse single-use PET bottles. See non-toxic kitchen alternatives for glass and filtered water options.
The research at a glance
What to use instead
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