Necessary Supplies for Your Bar

Bartending, even at home, requires lots of supplies, mixers, and garnishes. In addition to beer, wine, liquors, and liqueurs, a decent home bar should have the following supplies if you plan on serving cocktails. You need one bottle of the following mixers for every five guests:

Cola or diet cola	Lime juice
Cranberry juice	Orange juice
Ginger ale	Pineapple juice
Grapefruit juice	Seltzer water or club soda
Lemon juice or lemon mix	Tomato juice
Lemon-Lime soda	Tonic water

You also need these fruits, garnishes, and seasonings:

Lemon twists	Angostura bitters
Lime and lemon wedges	Salt and pepper
Maraschino cherries	Superfine sugar
Olives	Tabasco sauce
Orange slices	Worcestershire sauce

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Source:http://www.dummies.com/how-to/content/necessary-supplies-for-your-bar.html