Alright, future Water Sommelier, here’s your cheat sheet. First, wash your hands—yes, even if you just did it an hour ago. Second, boil the purified water if your baby is under 3 months (or if you feel extra anxious). Let it cool to room temperature.
Third, pour the water into a clean bottle, then add the formula according to the package instructions. Shake it like a polaroid picture—not too hard, or you’ll create a foam party. Finally, test the temperature on your wrist. If it feels neutral, you’re good to go.
