This is a custom box with a Batman logo on the top. It's size is designed to tight fit a TP-Link M7350 Mobile Wi-Fi device with a 1.7mm foam around it.

It has three parts: the bottom, the top and the logo. Print the bottom and the top with black and the logo with yellow filament.

You can even have the box without printing the logo, the Batman logo in black only looks cool as well :)

Use 3×2 (3mm diameter, 2mm tall) magnets to fit the bottom and the top parts to each other.

Use CA glue to fix the logo into the top.