This is a Marie Laveau piece and it was used to remove the demons AND to call upon the underworld, basically giving you control over how you want to use it. This is instant, no waiting. You can banish OR call the spirits and they are bound. You may use the item over and over again by simply filling it up when the liquid is gone. All the snakes are different inside and made that way because they all hold many spirits, Gods and Goddesses and Voodoo magic along with Catholic saint power as Voodoo was often mixed with Catholic religion.
See the YouTube video: http://www.youtube.com/watch?v=gUlEZrXqgto