text_1: Reusing, freezing, or warming plastic water bottles will cause them to break down into carcinogenic compounds or release dioxins.
text_2: What's false: Reusing single-use PET bottles doesn't cause them to release carcinogenic DEHA into the fluids they contain; freezing plastic water bottles doesn't cause them to release carcinogenic dioxins into the fluids they contain. What's undetermined: Whether heating some types of plastic bottles could increase the leaching of harmful phthalates into the fluids they contain.