This box and lid can hold 3 travel adapters.

The adapters that it is made for are the TESSAN International Power Adapter 2 USB Type C Outlet Adapter Charger.

The box should be printed with the opening facing upwards. And the lid should be printed with the text facing upwards. A small amount of support is needed on the upper lip area of the box.

Once printed, the lid slides into the upper area of the box.

I modeled the adapter just so that it is easily shown how they fit into the box.

For slicing and printing I used 0.2mm layer height and 20% infill.