I'll take your word for the dust reduction properties.  But to me, the 'oh wow would you look at that' moment was when Tom turned it backwards and the bird seed just sank right out of sight!  Almost like magic how a slight turn to left or right makes the product just fill and drain along the tube wall with almost no internal agitation.,(reply>), its all in those little fins at the bottom of the tube. Turn them one way and theyre forcing material into the thing and making it climb the screw, turn it the other way and it's actually pushing away the material in the bowl, giving the material in the screw space to fall into. If those fins werent on the bottom the thing would do nothing. Very cool invention and a very simple principle.