It’s a BPA plastic and is considered an Endocrine disruptor:

Endocrine disruptors “hack” the hormonal message and produce effects such as neurobehavioral deficits, learning difficulties and they have even been linked with syndromes like Asperger’s and autism. Other effects are endometriosis and poor sperm quality, which results in increased infertility. There are more and more infertility clinics in our cities. They also produce metabolic disruption, which leads to obesity, hypertension and Type 2 diabetes, which can cause a lot of health problems and a public huge health expenditure.