A great article written by TranSpread on PHYS.ORG on the effects of sunlight on plastic water bottles.
Plastic water bottles are ubiquitous due to their convenience, yet they harbor potential risks. Sunlight exposure can lead these containers to degrade and emit volatile organic compounds (VOCs), which are potentially detrimental to human health. The booming bottled water market underscores the urgency for safer alternatives. In response to these concerns, there is a pressing need for in-depth research into more secure materials and production methods for water containers.
Read more on phys.org link below.
https://phys.org/news/2024-06-sunlight-plastic-risky-combination-bottled.html