Want to know the name of a model!

There is a sailboat in the glass bottle, with a narrow mouth and a big belly. Germans call it a "wine bottle boat". And a drift bottle or a drift boat? There is a sailboat in the glass bottle, with a narrow mouth and a big belly. Germans call it a "wine bottle boat". This is a famous specialty in Germany, and it can only be made by hand, which is difficult to process, and there are fewer and fewer technicians who can do this kind of boat, so the price is more expensive. The picture shows the German mechanic concentrating on processing the "wine bottle boat".