Store-bought, unopened: 1-2 years past the printed date in a cool, dark place. After that? It’s not dangerous, but it might taste like you’re sipping a melted plastic fork.
Tap water, home-filled: Replace every 6 months. Label your bottle with a marker—seriously, write “Drink by December” so you don’t accidentally test the limits of human endurance.
After opening: Finish within 3-5 days if refrigerated. After a week, you’re basically drinking from a petri dish. You do you, but I’m not joining that party.
