Add the water and hibiscus flowers to a heavy-bottomed pot with a tight fitting lid. Bring the water to a boil then shut off the heat, leaving the covered pan on the burner to steep until the liquid reaches room temperature. Line a colander with a coffee filter or use a fine mesh sieve to strain the liquid from the flowers. Discard the flowers, rinse the pot, and return the strained liquid to the pot over medium heat and stir in the Stevia. Don't be dismayed if it clumps at first, keep stirring and it will dissolve. Once the Stevia has dissolved, stir in 1/4 cup of the lime juice. Taste the syrup. If the flavour of the Stevia is pronounced, stir in a little more lime juice to help mask it. Pour the syrup into sterile jars with tight fitting lids.Store thusly in the refrigerator indefinitely.

If desired, fill a glass with ice. Pour about 1 tablespoon of the Calorie-Free Hibiscus Lime Syrup into the glass. Pour 8 ounces of chilled seltzer or club soda over the syrup and ice. It will foam up like a proper soda, so be prepared to slurp! Stir gently, take a sip and adjust the sweetness if desired by adding more syrup. Serve immediately!