Stackable Plant Pot Holder

My cacti started growing out of hand, and I needed more place for them, so I designed this stackable thing, where you can put your flower pots into.

For the measurements:
hight: 15cm
broad: 15cm
diameter of the pot hole: 14cm
the thickness of the "table" is 1.5cm

with this data you can just fill up the hole and make one in the size you need.

In addition, I uploaded the support foot, so you are not bound to stack pyramids.

I hope you like it!