This vintage John Bull Cobalt Blue Eye Wash Cup is a unique addition to any collection of optical collectibles. With its eye-catching blue color and intricate design, this cup is sure to impress any collector or enthusiast.

Crafted with precision and care, this cup is made to last and is a testament to the quality of optics in the early 19th century. Use it to hold your favorite beverage or display it in your collection. This piece is a must-have for anyone interested in the history of optics and medical technology.