My creation of Robert/People planter, this one is called “Thinker”.
For medium sized plants choose medium sized version, cup size 80 mm / 3.15 inch.
For larger ones - Large, cup size 110 mm / 4.33 inch.
This model can be printed without supports! If you have trouble with bed adhesion turn on Brim.
I like to print these planters with fuzzy skin turned on (contour, fuzzy skin distance - 0.08, fuzzy skin thickness - 0.28). It can be printed smooth also, just be sure to check if seam is placed at Back/Rear.
When planting cactus or succulents at the bottom I add a little bit of pebbles for drainage and then potting soil.
And don't forget to water it according to your plant needs :)