Antique Embalming Gravity Flask Pump

Here are two rare late 1800s gravity embalming flasks. Pre-mechanical way to embalm the body. You would mix and dilute your chemistry and then raise or lower the flask in order to increase the flow of your mixture.
 
Two are available:
-The smaller size is around 12 inches tall
-The larger size is around 13 inches tall and includes hardware for raising and lowering. It seems to function, but cannot gaurantee its in 100% working order.