using it long term i would be worried about the plastic nanoparticles slipping into the coffee. i know they say it does not but i do not believe it. i do not even use paper filters because they are also made with chemicals which will be dissolved by hot water. i use a steel screen. i like all steel coffee makers. for example bialetti. very cheap. also metal or glass french presses do not have any plastic. at home i use an espresso machine from bezzera, the inventor of espresso. it makes the best coffee in the world