Rub a lime or orange wedge around the rims of your glasses and roll the rim in sugar for garnish.
In a large carafe or pitcher, add 2 cups orange juice, 4oz (½ cup) of tequila.
Immediately before serving, pour in the champagne to taste. (I use the entire bottle of champagne).
For the full tequila sunrise effect, pour a little grenadine into the glass (optional). Then pour the orange cocktail overtop. Garnish with orange or lime wedges to serve.