Tap water is regulated hourly. It’s tested for bacteria and chemicals constantly.
Your tap water, sitting in a glass on your nightstand, is safer than a bottle of “spring water” from 2019 that baked in a warehouse.
If you want water that lasts forever? Get a glass bottle. Glass is a stone. It doesn't leach. It doesn’t taste like a shower curtain.
So, when does bottled water actually go bad?
The official answer is: It doesn't, if stored perfectly. Cool, dark, and sealed.
The real answer is: It goes bad the moment it tastes like regret.
Trust your nose. Trust your tongue. If it smells like a plastic factory or tastes like a garage floor? Pitch it. Your taste buds are smarter than the expiration date.