Haven't decided on which shop vac yet, but I thought I'd share some
brilliant ad copy for one of the 14 gallon Ridgid model on the Home Despot
web site:

"For your added convenience, the patented car nozzle attachment cleans out
the back of your truck to make room for your tools and equipment."

That's a lot of vacuum-size dirt in the back of a truck. Not enough room for
tools? Sand storm, maybe? :-)