This recipe can be easily doubled or tripled for larger groups.
For a non-alcoholic version, replace tequila and triple sec with lemon-lime soda or sparkling water.
The blueberry syrup can be made ahead and stored in the fridge for up to a week.
Fresh thyme works best, but dried thyme can be used in a pinch. Use about 1/4 teaspoon per cocktail.
Try different berries like raspberries or blackberries for tasty variations. You can also experiment with other herbs such as basil or mint.