The Planter is used in the 3Dponics Cube System to hold the growing medium for the plants. The previously germinated seeds are planted inside the cup and it is then filled with moisture-absorbing volcanic rocks, coconut coir, etc. Know how to make this part better? Have ideas for new parts? Visit our website (https://www.3dponics.com) and join our Google+ community (https://plus.google.com/u/0/communities/111638904033818784260) to take 3Dponics to the next level!