Humidity trays are wonderful inventions! They give a level surface the pots can sit upon, they add some humidity to the air around the pots and plants and they allow watering in place instead of the chore of moving the plants to a sink for watering.
The plastic tray is a solid piece (no drain) with a plastic grid surface that is easily removed for cleaning.
Included: One Black Plastic Humidity Tray with Removable grate. (26¼" x 6½")