Can you put hot water in a plastic water bottle?

Whether a plastic bottle is suitable for holding hot water depends primarily on its material. Below is an analysis of the heat resistance and safety of common plastic bottle materials:

Polyvinyl Chloride (PVC): Not suitable for hot water. PVC releases toxic substances such as vinyl chloride at high temperatures, which are harmful to human health.

 

Polyethylene (PE): Has poor heat resistance; filling it with hot water may cause deformation or melting, and may also release substances harmful to health.

 

Polyethylene Terephthalate (PET): Can withstand hot water temperatures of 60-70℃ for short periods, but may hydrolyze over prolonged periods or at high temperatures, causing the bottle to soften and release trace amounts of harmful substances.

 

Polypropylene (PP): The most suitable material for holding hot water, with heat resistance exceeding 100℃. It is chemically stable and does not easily release harmful substances.

 

Furthermore, polycarbonate (PC) plastic bottles are restricted for use as food containers in many countries because they may release bisphenol A (BPA). It is recommended to choose plastic bottles labeled "PP" or "food grade" for hot water and avoid prolonged use at high temperatures.