Having owned a Rainbow vacuum in the past we knew the hassle involved in cleaning dirty water before dumping it. This might put some people off, not as easy as a vacuum with a bag or cup in that respect. The Sirena so far seems to work well.
I received this with my package buy for the vacuum. It was in good shape but I do not need to use it right now.
Excluding recertified Sirena vacuums and products on sale.