Creating brand merchandise is a great way to create loyalty among your customers and have them introduce your name to new audiences. Near Charleston, South Carolina, Firefly Distillery--which makes the popular Sweet Tea Vodka and other southern-flavor-infused beverages--was just getting its business going when it started giving away branded shirts. When the beverage got popular, the company began selling the shirts along with other merchandise. Also, remember that when you buy in small increments you can build demand while keeping costs manageable.