The TRUTH About Vacuums #1
If you use the right sized funnel to seal on the ball, you can probably pick one up with your mouth! Sealed suction cups are how heavy panes of glass are carried (with no motor whatsoever!). So, anyone bragging about this "bowling ball" trick are playing on our ability to be dazzled by marketing ploys.
P.S.: This is also a company that has much to hide, as their products can't sell on their own merits, so diversionary tactics are used.