The .stl includes an individual succulent planter with a parallelogram footprint. Three succulent planter tessellate to form a hexagonal footprint.
Find other small planters here:
-Wall planter: https://www.prusaprinters.org/prints/28415-airplant-and-succulent-wall-planter
-Spinning planter: https://www.prusaprinters.org/prints/28419-spinning-planter
The author hasn't provided the model origin yet.