What kind of alcohol is in a Manhattan cocktail?

Fill a cocktail glass with ice and cold water. Set it aside. Fill a mixing glass with ice. Add 2oz (40ml) rye or Bourbon whiskey, .5oz - 1oz (10-20ml) sweet vermouth (sweet vermouth is also called Italian or rosso vermouth), and two dashes of of Angostura bitters. Stir for about 20 seconds. Spill the ice and water out of the cocktail glass. Strain the Manhattan cocktail into the glass. Garnish with a maraschino cherry or an orange twist.

If you prefer, you can shake a Manhattan in a cocktail shaker, but it will be cloudy.