My print example is at 40% because I didn't have enough material, but it still worked well after working in the threads. I recommend using support in for the bowl part as I didn't and it would have came out better with supports on. At 100% it has a 150mm diameter perfect for a small potted plant.
Put your secret things in it and place a plant on top. No one will be the wiser.
The author hasn't provided the model origin yet.