OMG you found the moose on the table as thy say in Canada. Here we would say the elephant in the room - everybody is aware of it but nobody acknowledges it. These were around when I started collecting glass, way back in prehistoric times - but nobody knew, no stickers, nothing. Here they are known as cabbage trunks - for lack of better. But I did see a Czech woman collect them systematically on a fleamarket - so she must have known about these....