” what chemicals are these materials leaching and and how does the age and conditions they are used under effect the rate at which they leach?”
https://www.consumerreports.org/health/food-contaminants/the-plastic-chemicals-hiding-in-your-food-a7358224781/
“Bisphenols and phthalates in our food are concerning for several reasons.
To start, growing research shows that they are endocrine disruptors, which means that they can interfere with the production and regulation of estrogen and other hormones. Even minor disruptions in hormone levels can contribute to an increased risk of several health problems, including diabetes, obesity, cardiovascular disease, certain cancers, birth defects, premature birth, neurodevelopmental disorders, and infertility.
Those problems typically develop slowly, sometimes over decades,…”
“…All that makes it difficult to trace any particular bad health outcome—say, a heart attack or breast cancer—to the chemicals. And it makes it hard for regulators to set a limit for what is considered safe for any food…”
“…For example, one of the most well-studied phthalates is called DEHP. Studies have linked it to insulin resistance, high blood pressure, reproductive issues, early menopause, and other concerns at levels well below the limits set by American and European regulators…”
some other article I read said that other chemicals than BPA and phalates are also of concern, these are just the ones that are popular to talk about.
Glass and stainless steel are better
I use plastic bottles when hiking because they’re lighter and the risk is probably low. Especially if I don’t put hot liquid in it.
I think that taste in your Vessica bottle is the plasticizer leaching out, what makes the plastic soft. I think the PET bottles like smart water are better.