I recently moved into a house wich has less storage room in the kitchen. For instance to store the lids for pots and pans. This simple model I whiped up can be used to easily store these on the inside of a kitchen cupboard door.

Print 1 for a small potlid, or use 2 to be able to mount a large one.
It is attached using 4x40 mm screws.

The model prints without supports, in PLA or PETG etc. 
The ones Iprinted myself are 30% infill witha 0.4mm nozzle and 0.2mm layer height.

If you want to sell physical copies of this design, it can be found in the printables store here