It would be a tough contest for the most valuable tool on board Q. This compact vacuum cleaner would certainly be very high on the list. Not sure we would want to spend a day onboard without one.
The unit is used to remove liquid from places where we don’t want it anymore like bilges or fridges/freezers… and also from places where we don’t want air anymore… like plastic storage bags and the dinghy.
One of the most economical investments… cost less than $30 and in 7 years we have only had to replace the hose.