Combine ingredients, add ice, and shake vigorously.
Strain into a Collins glass filled with soda water.
Add fresh ice and garnish with celery sprig.
* Jalapeño celery syrup: stalk of celery, sugar cube, 1 oz. hot water, ½ jalapeño. Muddle (use force) celery stalk, sugar cube and jalapeño pepper into a bowl or cup. Add the hot water, mix and strain.