Yield: makes 1, multiply as needed
Fill cocktail shaker with ice. Add tequila, lime juice, grapefruit juice, orange liqueur, and syrup. Shake well until well chilled. Strain into a salt-rimmed serving glass.
Add water, honey, and thyme to a heavy bottomed sauce pot. Bring to a simmer until honey has dissolved. Remove from heat and let thyme steep for 30 minutes. Strain out thyme. Transfer syrup to airtight container and keep at room temperature.