A myth is usually circulated among people that using plastic bottle for water is very dangerous for health and can cause cancer, the truth is no research supports this myth.
Yes plastic contains BPA and if the amount is high it can cause health issues but the plastic bottle or other plastic items which we use in our house do not have high level of BPA.
People also talk that water left in sunlight is dangerous to consume, this is true because the hot water may affect our digestive system but it doesn’t contain any harmful component as proposed by some people.
But make sure that these plastic bottles are clean and are not affected by germs. It is better to use alternate metal bottles which can be reused for a long time because plastic causes pollution and it harms our environment.