Invisalign or retainer tray

This is my first take of modeling something rather interesting starting from the first vertex. I wanted a tray for my car and work so I would always have somewhere to put my Invisalign when I was eating, so I modeled these up and was incredibly surprised that it worked flawlessly first print with absolutely no tests! Other options I found online required magnets that I didn't have, so I created one with a latch mechanism and it fits as perfectly as I could hope. There is very little wiggle horizontally so I modeled the grooved version and I'm currently in the process of printing it. The ungrooved version for sure works great though!