Drinking water from an old, frozen plastic water bottle that has been sitting in the freezer for months or years is generally not recommended for several reasons:
Degradation of plastic: Over time, plastic can degrade, especially when exposed to extreme temperatures like those in a freezer. Freezing and thawing cycles can cause the plastic to break down, potentially releasing harmful chemicals into the water.
Leaching of chemicals: Certain types of plastics may contain chemicals like bisphenol A (BPA) or phthalates, which can leach into the water, especially when exposed to temperature variations. These chemicals can be hazardous to health if ingested in large quantities over extended periods.
Potential for contamination: Frozen water bottles may be susceptible to contamination if the bottle was not properly sealed or if the cap was not cleaned before freezing. Harmful bacteria or other pathogens could enter the water during the freezing process or while thawing.
Loss of water quality: Prolonged freezing can affect the taste and quality of the water. The water may absorb odors from other foods in the freezer or develop an unpleasant taste due to changes in its molecular structure.
To ensure safe drinking water:
Use proper storage containers: Choose BPA-free and food-grade plastic or opt for stainless steel or glass water bottles, which are less likely to leach chemicals into the water.
Rotate stored water: If you need to store water for emergencies or convenience, rotate it regularly, and don't keep it in the freezer for prolonged periods.
Clean and sanitize bottles: Before storing water, make sure the bottles are thoroughly cleaned and sanitized to reduce the risk of contamination.
Monitor storage conditions: Store water bottles in a cool, dry place away from direct sunlight and extreme temperatures.
If you find an old frozen water bottle and are unsure about its safety, it's better to err on the side of caution and dispose of it properly. Instead, use fresh, clean water from a reliable source for drinking and always stay mindful of water storage practices to ensure your health and safety.