This print helps you charge your (non magsafe - older generation) airpods on a magsafe charger that's not flat on the ground and requires magnets to stay in place.
Its designed for a tight fit with the AirPods Pro. You can insert your airpods in 2 orientations and they will charge correctly:
Horizontal
Vertical
For this to stick to the magsafe charger you need to stick a metal ring like the ones you can buy on Aliexpress or Amazon. The ring has to have an inner diameter of at least 45mm and a total width of 5mm and a thickness of 1mm :