Take a pre-chilled rock or shooter glass and pour in 1 part of tequila into it, filling half of the rock glass.
Gently top the tequila with 1 part of your favorite champagne flavor. It will produce a unique fizz in your Slammer Royale Cocktail.
Carefully add in 1 part of 7Up or ginger ale which will fill the remaining half of your rock glass.
Now, cover the opening of your rock glass with your hand and make sure to shake it until some bubbles appear.
Garnish the Slammer Royale Cocktail with fresh lemon or lime wedge and serve immediately with bubbles vigorously coming out.