This vintage Fleaker Beaker by Corning Pyrex No 5900 is a great addition to any apothecary lab. It has a volume of 800 ml and is made of durable Borosilicate Glass. The beaker is perfect for measuring and mixing different solutions and substances, and is designed to withstand high temperatures and sudden changes in temperature.

The beaker is marked with the Pyrex logo and was manufactured in the United States. It is a rare find and is sure to impress any collector or enthusiast. The item is in excellent condition and is sold as-is.