A:Answer The entire machine is BPS free, and whether or not the Porta Filter has a rubber ring is not important, that is what is called a gasket and it is nescesarry to prevent things from leaking in parts handling liquids, and that disconnect at some point. the gasket on this particular model is between the the two cup sizes and the metal body of the portafilter, coffee travels over majority of just stainless steel and nothing else, the only exception being a plastic pump from water tank to boiler, which any automatic espresso machine also has as most pumps are either a plastic corkscrew or a medical style pump.
To clarify, there is plastic your water and coffe will come across but it is all non-toxic and is not capable of negativley impacting your health, or your morning coffee.
