Some science nerds actually tested 20-year-old bottled water. They found algae growing inside one bottle. Algae! In sealed water!
How does that happen? A tiny bit of sunlight snuck through the plastic. Algae spores floated in during the bottling process. Years later, you’ve got a green science project in a bottle. But even that is not toxic—just gross.
The real danger? Microbes. If the bottle’s seal is broken, bacteria can move in. A warm car is a bacteria spa. But that has nothing to do with the expiration date—it’s about poor storage.
What about the “Best By” date on your tap water?
Tap water doesn’t have an expiration date. It just sits in your pipes forever. But if you leave a glass of tap water on your nightstand for a week, it tastes weird and dusty.
That’s because it’s not the water going bad—it’s the environment. Dust, pet hair, and your own breath settle into it. The water is fine. The glass is a mess.
Bottled Water Expiration Date Fda at Aiden Darcy blog
Funky fact: ancient Roman water in sealed amphorae has been found and tested. It was still drinkable. The Romans drank 2,000-year-old water. Your 2019 bottle is basically a spring chicken.
