It is convenient for painting small items and using a small amount such as repair paint. A cup inside is a little ten yen, so even if it is disposable it does not matter. It is stable even if it is filled in a container. I put paint thinner and use it for temporarily immersing used brush. Even if you hold the handle and mix two-part type paint, it will not crumble, it also has durability. I think that it is a well considered holder.