> Well then, why didn't you come up with it first?

This is never a good question. It doesn't take much imagination to substitute X in "Why didn't you come up with X first?" with something of no value. Obviously, if someone finds something to be of no value, then they would not have come up with it, would they. Or at least they would not have pursued it.

Rather, one must give reasons for believing something has value. (And I seriously doubt this is "new", though novelty is itself irrelevant. Valueless things can be "novel", too.)

IMO, this glass technique is maybe interesting, but it is also sort of gimmicky, at least as presented.