I couldn't find a named glass factory in the vicinity, but most small glass factories have gone out of business in the last few decades. However, there must have been something in Bornheim at some time, since the map of this place shows that there is a quartz quarry near this town. Can't imagine there being a resource like that not being used locally. Maybe someone else knows a bit more.
And there's of course always the possibility that this is a retail label instead of a producer's label.
Astrid