In a clean glass jar, combine 4 cups of filtered water with 1/4 cup of organic sugar. Stir until the sugar fully dissolves.

Once the sugar water is cool to the touch, gently add 1/4 cup of water kefir grains.

If you want to flavor your kefir water, toss in 1/2 sliced lemon or 1/2 cup of your favorite fruit.

Cover the jar with a cheesecloth or coffee filter secured with a rubber band.

Let the mixture sit at room temperature for 24 to 48 hours.

After fermentation, use a fine mesh strainer to separate the kefir grains from the liquid.

Pour the strained kefir water into clean bottles, leaving some space at the top.

If you want a fizzier drink, seal the bottles and let them sit at room temperature for another 12 to 24 hours.