It is important to use the right style of glass for each cocktail recipe, not only to ensure that it is the right size for the quantities made, but also to create the best visual impact. You should also make sure that all your glassware is scrupulously clean; if you don't have a dishwasher or glass washer and drier, polish them completely dry with a clean glass cloth after washing to avoid stains.
The menu below displays the range of glassware you'll encounter in most cocktail recipes: