sugar
1 oz of Vodka
1/2 oz of Triple Sec
1 splash of Rose's lime juice (or Lime Juice)
Champagne
1/2-3/4 oz of Chambord Raspberry Liqueur (or raspberry liqueur)
Rim a martini glass with sugar. Pour vodka, triple sec, and lime juice into shaker half filled with ice. Shake and strain into the martini glass. Fill the remainder of the glass with champagne. Pour the chambord in last making sure that it hits the side of the glass first. It will sink to the bottom giving you a drink that is half purple half white.