Resurrection tub

Sharon Valerii is reborn in a Cylon rebirthing tank.

A Cylon rebirthing tank is a large tub where the consciousness of a deceased Cylon agent is transferred to a new Cylon body that is suspended within a thick gel. A blue light shines down onto the resurrected agent's head.

The tub apparently acts as a receiver from a Cylon download station (either planetary-based or via a Resurrection Ship) where the consciousness of a killed Cylon agent is re-integrated into a new body to begin life anew. Other agents tend to the new body as its consciousness reforms, encouraging and comforting the recovered agent in a fashion that may be reminiscent to viewers as midwifery.

The copy of Number Six that plays a dominant role in the Fall of the Twelve Colonies is resurrected in the tank, as is the Galactica-stationed Number Eight model formerly known as Sharon "Boomer" Valerii (Downloaded).