This pot is made with 4 components

•  wall mount: compatible with lots of screws and nails, this part can be left on the wall when taking care of your plant
• external vase: contains both the pot and the water drawer and allows you to take all those part easily
• internal pot: a standard pot that fits into the external vase, it has holes to drain water
• water drawer: a little drawer that can hold up to 250ml of excess water, so you won't have to concern about watering too much your plants

The vase doesn't require any supports, as it's already supported (the first plate is already supported), be only careful to set the “thin wall detection” mode or every mode that allows 4mm thick walls to be printed, or the supports won't be generated

The inner pot should be upscaled to 104% to better fit into the vase

For the internal parts (last two of the list) I'd suggest to use PETG, so it doesn't deteriorate being in water and dirt