Here’s where it gets a little weird. Plastic bottles (the cheap, crinkly kind) can leach chemicals like antimony or BPA over time, especially if they’ve been sitting in a hot car. That’s why you shouldn’t leave a case of water in your trunk during a summer road trip—you’re basically slow-cooking a chemistry experiment.
If your old bottle has been stored in a cool, dark place (like a closet or basement), it’s fine. If it’s been baking in the sun next to your flower pots? Do not drink that. It might taste like regret and a hint of plastic factory.
A Quick Rule of Thumb
For unopened water: up to 2 years for “best flavor,” but it’s safe for much longer. After that, the water won’t harm you—but it might taste like you’re drinking from a shower curtain. If you want that crisp, mountain-stream feeling, stick to the fresh stuff.
And if you’re really worried? Smell it. Water has no smell. If it smells like pool water, chemicals, or your gym bag, your nose is telling you the truth.
How Long Is Bottled Water Good For? Experts Reveal The Answer
