Place a wet from the outside copper mug into crushed ice and fill it to the top with ice cubes
Pour 1 oz of orange juice, 1 oz of pineapple juice and 0.75 oz of Maraschino liqueur into a mixing glass
Fill the glass with ice cubes
Add 4 oz of champagne and stir gently
Strain into the copper mug
Serve on a saucer, garnished with a mint sprig, bilberries and raspberries