We’re mostly made of water, and our bodies use it like crazy to perform almost every function. We also lose a lot of it during natural waste processes—sweating, breathing, and using the bathroom. As an old guideline, health professionals and clinics have recommended drinking anywhere from 12 to 15 cups of water a day, or more familiarly, a baseline of eight glasses.
Some brands who package their beverages in plastic bottles have taken to reframing this recommendation, which comes from the Mayo Clinic, in terms of bottles, as in: How many bottles of water should I drink in a day? And because our mission is to eliminate single-use plastics, and because single-use plastic bottles are one of the world’s largest offenders in plastic pollution, obviously we are not in favor of this mindset. Instead of thinking in terms of “how many bottles,” we’d urge you to think in terms of the amount of water to drink, whether that’s in cups, ounces, or liters (that’s right–you should be drinking several liters a day!).