#5. BITTERS
A combination of fruit, herbs, bark, and roots, bitters are often a small but critical piece of the cocktail. Angostura bitters shows up in both the Manhattan and the Old Fashioned (and is sometimes included in mojitos). You never know when you’ll need a little bitters, so even if it collects dust, make sure it’s on the shelf.
#6. Glassware
Make sure you have a variety of glasses to serve cocktails and mixed drinks, including highball glasses, rocks glasses, and martini glasses.
#7. Garnishes
Keep some lemon, lime, and orange wedges, as well as olives and cherries, on hand to add a finishing touch to cocktails.