What is the material of the Thermomix® Cutter? High grade plastic, BPA free; stainless steel. Related articles What materials are used to produce the Thermomix® and the Thermomix® accessories? Is everything on the Thermomix food safe? Does the Thermomix® contain BPA? What is the Prop 65 Warning? What kind of recipes can I make using the Thermomix® Cutter?