A:Answer Stainless steel, Glass outer container, plastic lip attachment that connects to and from lid to the stainless steel basket. Small plastic seal around thermometer built into base plate. Acceptable materials for design and function. I highly recommend if a fan of tea. No info available on plastic type as it regards BPA unless I missed it the manual. Any and all metals and plastics leach when heated regardless of manufacture information. Clay pots are the only way to go if looking for zero contamination…clay is edible, full of minerals and vitamins and according to most belief systems we are made of it so nock your self out. I use this model as well as a hand made cast iron and occasionally a clay pot dependent upon my taste palette for the day. Clay pots require constant use for moisture and cleaning which involves just warm water.
