Picture this: You leave a plastic water bottle in your car during a summer heatwave. After a few hours, that bottle is a microwave of regret. Heat accelerates chemical leaching big time—like, 10x faster than room temperature. A study found that bottles stored at 158°F (your car in July) leached antimony at alarming rates.
It won’t kill you instantly, but it’s like playing russian roulette with your liver. The water might also develop a weird, chemical “plastic taste” that makes you question every life choice. My rule: if the bottle feels hot to the touch, treat it like a suspicious burrito—just toss it.
Is It Safe To Store Water In Plastic at Steven Hines blog