The plastic pen holder is mainly made of flexible materials such as PV. The material of wooden pen holder is almost unlimited. The main consideration is that the brittleness is not high. The metal pen holder that also needs a little toughness is mainly made of tinplate. The light and rustless bamboo pen holder is very simple and the manufacturing process is relatively simple, It is mainly due to the edge grinding process. Generally, foam pen holders are made of tough foam materials. Ceramic pen holders are exquisitely made