To make orange, fennel, and rosemary water, add the following ingredients to an 8 to 16-ounce glass:

  • 1 slice of orange
  • 1 slice of fennel
  • A ​small piece of rosemary (about 9 leaves, attached to the stem)

Fill the rest of the glass with filtered water and allow it to sit, covered, for 12 to 24 hours.