This is my representation of an Asian Wu Lou (see below) and is made of stainless steel that has been plated with 24kt gold.
The Wu Lou or Hu Lu is said to have the ability to absorb bad chi energy, and the reason that Taoist monks use the calabash to imprison evil spirits. According to Chinese mythology, Monks and Deities of the Taoist belief made use of the calabash Wu Lou by imprisoning evil spirits inside to stop them from causing more problems. This is where the Wu Lou got the ideology of being able to absorb negative chi in your surroundings.
The Wu Lou was originally used as a Feng Shui cure as a health enhancer and protector as the calabash was used to store medicine although traditional medicine would usually be a wine or spirit which is how the Wu Lou was adapted in to a wealth cure as alcohol became a symbol of wealth.