Olives are a delicious ingredient in many Mediterranean dishes and are popular for their savory flavor and nutrient density. They are extracted from the fruit of the olive tree and come in a variety of sizes, colors and flavors. Vinegar pearls are small, round balls filled with vinegar and come in a variety of flavors. They are often used in upscale cuisine as a decorative and flavorful ingredient and can be served as an accompaniment to salads, appetizers and desserts.