After visiting IKEA like shop (where i picked up an idea) i designed this cup hook (which cleaned out so valuable place on kitchen shelf :) ) I used 16mm long and 2.5mm thick wood screws to fix hooks to shelf (holes are designed for them) I would suggest "scale down" by 25%, original is almost 200mm wide, which is good for big mugs (but you will need thicker screws) Last but not least - this is my very first fully designed - printed - implemented in real life design! will be adding more stuff like that somewhat along the road! TY Community