This planter is designed with a spiral cut into the side walls (minimum thickness of ~3mm, maximum of 5mm). The spiral cut begins with a depth of roughly ~1.5mm at the top and gradually tapers to smooth by the base of the planter proper. Under the planter is an integrated catchtray that can be manually drained by tilting the pot to approximately 35 degrees. The drainage holes are filleted and have a minimum diameter of 5mm.

It's a rather bulky print and needs supports under the drainage holes. I'd recommend using support enforcers only under these to save on material without significantly risking the integrity of the print. 

Comment if you want a variation without the tray or a different pattern.