So, A smaller version of the cryo tank, but in this case, not cold at all and filled with an oxygen rich, anti-bacterial gel mixed with a regenerative substance.
Could potentially put more than one brain in the tank at a time, leading to the SS13 version of the fish tank you get at the doctors, plus, you could put it in the medbay lobby, allowing for people to quickly dump brains into the tank. couple this with the ice boxes, and people could save brains far more often.
Or someone could steal a brain from the tank, stuff it into an ice box and run away cackling to victory.