The Rootcups are made of a non-toxic material and are fairly small in size which makes them easy to put on a windowsill.
The top of the Rootcup has a slit and a round hole in the center to allow the plant stem to easily be removed from later. I was sent a set of green Rootcups and a set of gray Rootcups but they also carry a clay version.
People have been using water to propagate cuttings for a very long time. You take a jar, glass, or cup put water in it, put a cutting in it, then set on a windowsill and wait for roots to form - the classic water propagation method. The Rootcup takes that idea and adds a special feature - removal of the light, specifically the light around the root forming area. Keeping light away from the root area is important since you get better quality roots when they form in the dark (as they do when planted in soil) and because it reduces the formation of algae.
Rootcups could be an interesting option as a party favor, lesson on botany for children, or even a nifty way to share a favorite plant with a friend.
|African violet root starting to form|
Overall I found Rootcups to be a good quality product that performs admirably at propagating succulents, coleus, African violets, and many other plants.