This vintage cobalt blue bottle from the Emerson Drug Co in Baltimore is a must-have for collectors of modern medicine bottles. The bottle holds 4 oz of liquid and features a vibrant blue color that is sure to catch the eye. Made in the United States, this bottle is a true piece of American history that is perfect for display in any collection. Whether you're an avid collector or just starting out, this bottle is a unique and valuable addition to your collection.