Although there are quite a number of French press nowadays made of plastic, it can be used but not highly recommended. Even though most of the plastic French press are BPA free, it is not entirely safe when use on a daily basis. Aside from that, Plastic French press is not long lasting. That is why it is not recommended to use Plastic French press. Most plastic can tolerate high temperature, however though, when a plastic is exposed to extreme heat for a ver long time it will start to deteriorate. And when that happens, it releases chemicals that can be harmful to our body. With a Plastic french press, the coffee taste will be different.