Step 1

Thoroughly wash and rinse the grapefruit, then cut into chunks or slices, leaving the skin on. Add the grapefruit to a pitcher or into separate drinking containers.

Step 2

Press the rosemary gently between fingers or palms of your hands to help release the natural oils. Place rosemary in the pitcher or drinking containers.

Step 3

Fill with water and place in the refrigerator for at least 15 minutes, or up to 48 hours. If you're using sparkling water, keep in mind that the sparkling quality will wear off with time.