In a blender, add water, SPLENDA® Naturals Sugar & Stevia Blend, cilantro and jalapeño. Puree until for 30 seconds, until combined. Strain through a fine mesh strainer into a pitcher. Add lime juice and stir. Can be made a day in advance and stored in the refrigerator.
For Sweet Spicy Rim: Combine SPLENDA® Naturals Sugar & Stevia Blend, chili powder and salt in a shallow dish. Rub rims of 4 glasses with 1-2 lime wedges. Dip the rims of glasses in sugar mixture.
Fill each glass with ice, add 2 ounces of tequila and 5 ounces of spicy lime juice. Stir, then garnish with a lime wedge and a slice of jalapeño.