The neccesities include a 2 oz. The bartender sizes him up, decides not to argue and mixes the potation exactly as ordered. Be very, very cold. On a hot summer's day your guests will thank you for it. Even on a cold winter's night if you are mixing Martinis your guests will be thankful for the ice-cold chill that warms their insides when all is said and done.
Ice can make or break a party.
Make sure you have enough of it. Store bought cracked ice is cool, clean, and convenient. If your water is especially hard, cloudy, or chlorinated, consider buying bottled water to make ice out of, mix scotch with, and to drink. Ice trays that make numerous small cubes are superior to the older trays that make 8 to 12 great big ice cubes. Cracked ice is best for stirring a really cold Martini.