This self watering planter is from this dude.
Remixed from www.thingiverse.com/thing:1625573
I added an outer planter that it can fit into. It is scaled to fit together. If you want a different size, scale both to the same amount.
Print in PETG as it is waterproof and resistant to UV.
About 20% infill. I didn't use any supports just make sure bridging in enabled in PrusaSlicer.
Use ironing on top surfuces for the outer planter, to help seal up the gaps and make it more water proof.
Give the inside a quick flame with a blow torch or jet lighter to make it more waterproof.
The author hasn't provided the model origin yet.