All of this could be made easier if there were an easy way to crush the different cans that a painting job can generate--from five-gallon metal cans all the way down to pint cans. Where maybe only a dozen or so uncrushed cans could fit in a regular trash can, you could get several cases' worth of cans into the trash if they were crushed. Transporting these cans off a job site, then, would be a simple matter of crushing them, tossing them all into a trash can, and hauling that off the site.
Most crushers on the market that are powerful enough to crush a paint can are enormous and expensive--hardly convenient or sensible for taking to a job site. But Bee Cool Manufacturing has created the Little Squeeze, which is perfect for exactly this kind of application. It's small--about the size of an average tool box--and weighs just over a hundred pounds. But it is strong enough to crush a five-gallon aluminum paint bucket to a sixth of its original size! And the Little Squeeze doesn't just work on aluminum, it works on heavier metals, too.