Stackable Mug Holder

Note for the model pictures:Top is the old design and only one of the hole covers is current design (the smallest one, some mug cannot fit to the bigger design). A mug holder for storage when not in use. It can hold up to 4 mugs per unit.Design to fit circular mug with diameter of 90mm to 70mm with a max height of 110cm.It is stackable. The connector for stacking it is very tight fit, a good amount of force it needed.The connector is on top of the model, have a 18mm diameter and is 3cm tall.A ho