Blood may be thicker than water, but sand is thicker than blood. And a bag of it is a lot less expensive than hiring a human to stand on things. 
 
This nifty little piece of equipment, composed of sand and a bag, comes with a 100% guarantee to work wherever there is gravity, and has yet to fail once in weighing something down. Equipped with a timelessly ergonomic handle for gripping with a wide variety of hand sizes, these sandbags wait for no one, and weight for everyone.