Combine all ingredients in a cocktail shaker with ice and shake until chilled. Strain into a double old fashioned glass filled with pebble ice. You can also serve it up in a cocktail glass, or over regular ice in an old fashioned glass. Throw everything in a blender with 3/4 cup of ice for a frozen version. Garnish with lime and something pink or red, if you’re feeling fancy.
Make it non-alcoholic: Use an N/A tequila like Ritual Zero Proof or just combine the lime and the syrup in a tall glass over ice, then top with sparkling water. Garnish as desired.