Water bottle saftey

Howdy,

Want to get some aero bottles and they are FAR cheaper on Ali express. Was wondering about the safety of drinking water out of an Ali express water bottle after baking in the sun on a summer ride…(figures this pertains to bike packers and roadies as the bottles sit in the sun all day)

I figure all name brand bottles are probably made in the same factory.

Made of PP5 plastic which is supposed to be food safe. Hopefully there are some chemists who can clarify details?

Thanks!!!