zipper idea

I am looking for innovative zipper designs for my project. The main purpose of this zipper design is functionality, as opposed to fashion or sustainability. I have a general idea of what I'm looking for, but am open to any features that could improve upon this concept and make it more efficient. Please see attached image of current design. I want to 'hide' the metal part of the zip. This is a double zipper and the top zipper is detachable but it leaves the metal part with the zipper eye exposed when zipped all the way up. is there way if hiding this part or another solution? If you have experience with innovative zipper designs and can help me produce a solution with a high level of functionality, please reach out!