We only use the highest quality materials for the BOD®. We partnered with Eastman® and use their cutting edge, co-polyester material called Tritan™. Tritan™ is dishwasher durable, stain resistant and is BPA, BPS, PVC and PHTHALATE free. Extensive third party testing by Eastman® shows NO estrogenic and NO androgenic activity. The BOD's, micro-mesh filter is made from high quality stainless steel and is naturally anti-microbial.