The portable charging case for Disney's MagicBand+. All components can be stored in the case when traveling, and the USB cable can be extended from the back of the case for charging, while keeping the wristband fixed and protected. It's also often suitable for keeping the room dark when charging at night.

If you need to carry multiple discs, I have a version that can hold four of them: https://makerworld.com/models/2050643