Cut a lime wedge and rub it along the rim of your stemless wine glass
Dip your glass upside down onto a small plate of coarse kosher salt to form salt rim
Add ice into your glass
In small tin add all ingredients except the fever tree sparkling grapefruit
In large tin add ice
Combine tins, form a seal, and shake vigorously for 15 seconds
Break seal and strain cocktail into glassware
Fill the remainder of the glass with fever tree sparkling grapefruit
Garnish cocktail with lime wheel
Enjoy!!!