Sorry to have dashed your hopes but I'm being serious. The decoration comes out of a squeeze tube. These sets are sold in hobby and toy shops, it is a type of resin or glue. The blanks are Arcopal automated production as described.
Now your clear cased green treebark vase or longdrink glass (depending on size, how many you have & how heavy they are) was possibly made by Oberglas Austria, by Ingridglas in Germany or by one of the manufacturers around Turin. It does look real enough, really.