After seeing other time travel models and considering whether I should try something new, I actually had an idea: a container

Closing it is simple, but opening it is not so intuitive; several people have asked me how to open it, because the only part you can grip on the inside is the exposed twisted part in the middle. Use your other hand to hold the top edge, twist it forcefully, and pull it out. You'll need a bit of strength to overcome the click lock.

Print:

Print one part in one color and another part in another color; PLA material is fine. I used a 0.4mm nozzle and didn't need a support structure. I recommend using different layer heights for the internal and external parts to reduce the feeling of scratches when sliding.

There's a bit of overhang that can cause some misplaced consumables to interfere with the sliding of the internal parts. So when you first try to insert the internal parts, it gets stuck. Try to push those things out with considerable force

Although it's not necessary, I like to switch the consumables in the inner part at a height of 1.2mm, so that the bottom part has the same color as the outer part, and the bottom part looks more uniform. You can refer to the third photo. This doesn't require AMS, you can just replace the consumables manually.