
That's the best thing to do with them. It would be nice to find the maker, and we might yet, but for now, just enjoy them. You liked them when you bought them; a bubble in a stem is a complicated thing to make even though it's been done for centuries, it's popular because it is lovely.
The nice thing about glass is that it doesn't matter who made it, if it is lovely glass, it is lovely glass and you are holding "the original", whatever it is.