This WMF SmarTea Tea Set features a see-through clear glass pot which allows you to visually monitor the tea's strength. This handsome pot sits atop a stainless steel base with an opening for a tea light for keeping the tea warm. The removable infuser piece is made of high quality stainless steel and is attached to a rubber gasket which acts as a seal, and the lid is also stainless steel. This SmarTea set underscores WMF's commitment to the highest quality and functionality standards.