There are two ways to serve this concoction, made popular to in 1970s-the traditional method, served over ice in a highball glass, or shaken and served up in a cocktail glass. Either will achieve the "sunrise" effect.
1 1/2 ounces silver tequila
6 ounces fresh orange juice
1/2 ounce grenadine (or Chambord)
2 or 3 ounces chilled club soda (optional)
STIRRED OVER ICE. Pour the tequila and orange juice into an ice-filled highball glass, and stir. Float the grenadine on top, and let it slowly descend through the drink. Top with club soda, if desired.
SHAKEN. Pour the grenadine in the bottom of a chilled cocktail glass. Shake tequila and orange juice vigorously with ice, and strain into the glass.
I prepared mine stirred and it was super good. I added the club soda...well, I actually had tonic at home and used that.