In your glass jar, combine 1 cup of grated ginger, 1 cup of sugar, and 2 cups of filtered water.

Cover the jar with cheesecloth or a coffee filter and secure it with a rubber band.

Stir the mixture once a day for about 5-7 days.

After about a week, check for bubbles forming in the jar.

In a separate container, mix the remaining 2 cups of water, 1/2 cup of lemon juice, and 1/4 cup of ginger bug.

Add 1/2 cup of sugar to the soda mixture and stir until fully dissolved.

Pour the soda mixture into clean bottles, leaving about an inch of space at the top.

Seal the bottles tightly and let them sit at room temperature for 2-4 days.

Check the fizz level daily and refrigerate once it reaches your desired carbonation.