Thistle tube

A thistle tube is a piece of laboratory glassware used to add liquid to beakers of other liquids, or sometimes to other pieces of equipment.

 Characteristics 
A thistle tube is a long hollow pole of glass which has a funnel at the top. Liquid is put into the top and travels down the tube and comes out the thin end of the tube in small drips which can be used anywhere. It is usually quite precise.

Other websites
Information on the function of a thistle tube 
Thistle Tube feeders for birds merchandise 

Category:Laboratory equipment