A shop vac is a surefire way to clean up messes. Thanks to the long, flexible tube, a shop vac is great for cleaning up dust in places that would otherwise be hard-to-reach. With a bit of creativity, you can fix problems in your home and garden using your shop vac. The shop vac canister — the main component that looks almost like a robot — has an inlet port and an outlet port. For instance, the Cheapest shop vac at Home Depot is only $39.97.