A racking cane is a plastic tube that is bent on one end and is used in siphoning beer from one vessel to another, known as racking. Siphon tubing is placed on one end of the cane while a plastic cap is placed on the other end which is inserted into the carboy or bucket. The main advantage to using a racking cane is that it allows liquid to be siphoned while filtering out the undesirable solids from the bottom of the fermentation vessel.