You are the problem. Yes, you. Each sip backwashes a cocktail of skin cells, saliva, and leftover lunch into the bottle.
Scientists found that a typical bottle of water contains tens of thousands of bacteria per milliliter after a few days of regular sipping. That’s more than a dog’s water bowl. (Don’t Google that.)
But don’t panic—unless you have a compromised immune system, those bacteria are mostly harmless. They just make your water taste like you, but worse.
The Surprising Fun Fact
Here’s where it gets weird: bottled water sold in stores has regulations. But tap water is tested way more often than bottled water. The EPA tests tap hundreds of times a month; the FDA tests bottled… when they feel like it.
So that pristine-looking “spring water” bottle? It might actually be less fresh than what comes out of your kitchen faucet. Mind. Blown.
But opened tap water? It also grows bacteria. The difference is tap water hasn’t been sitting in a plastic factory for months.
How Long Does Bottled Water Last After Opening At Room Temperature at
