Cotton, Plastic, Polypropylene (PP), Resin

【SELF WATERING】Every self watering planter comes with a matched water reservoir and a cotton wick that draw water up to the potting soil to keep the soil at a fairly consistent moisture level, it can offer 7-14 days self watering after filled up. (The rate of water consumption depends on the potting soil and weather.) 【LET IT DRAINAGE & BREATHE】Vugosson indoor planter box has lots of drainage slots, good drainage will keep plants away from root rot and allow the roots breathe well. There is also a gap under each flower pot, where you can drain excess water or fill the water, you can see the water level through this gap too. 【QUALITY MATERIAL】These 7 plant pots made of non-BPA and odorless PP resin plastic, allow your plants grow in a safe and quality home. Different sizes of boxes have different thicknesses from 1 cm to 2 cm.