For the Tequila Screwdriver: Add both ingredients to a highball glass. Add ice. If desired, garnish with citrus slices or a cocktail cherry.
For the Tequila Sunrise: Fill a highball glass with ice. Pour in the tequila and orange juice and stir. Pour the grenadine into center of the drink and it will sink to the bottom. Stir gently for sunrise gradient effect. See Tequila Sunrise for a photo!