"In Australia, we call them goon bags. And they exist for the cheap wine market ($15 buys you about 4 litres).  People often use them as inflatable pillows after a hard night on the p-ss. The issue with these often comes at the very end of the container when you are trying to get the last drops out. "

"How about another chimney instead?"

"I mean centrifugal of course ;S"

"Why not just use centripetal force?"

"Not to deter from what is obviously a lot of work and still very interesting, I would take this report with a pinch of salt. The main 'cluster' of participants would be somehow affiliated to Makerbot, a North american, 3d printing manufacturer. I think the best people to make a survey like this would be companies affiliated with the source of 3D modelling and drafting. (Someone like Autodesk Dassault, Siemens etc.)"