Jeffrey Morgenthaler, bar manager at Clyde Common in Portland, Oregon, calls this easy-to-make and easy-to-sip drink a "silver tequila Collins."
2 ounces silver tequila
1 ounce fresh lemon juice
3/4 ounce simple syrup
3 dashes grapefruit bitters
Garnish: lemon wheel and mint sprig
Fill Collins glass with ice. Add tequila, lemon juice, simple syrup, and bitters directly into the glass, top with sparkling water and stir gently. Garnish with lemon wheel and mint sprig.