Made with 18/8 pro-grade stainless steel for durability, pure taste and no flavor transfer Etched holes keep fine tea leaves contained Dual-function lid keeps heat in when brewing and also serves as a drip tray Silicone touchpoints remain cool to the touch Large basket capacity to make 16 ounces of tea with room for optimal leaf expansion Is not compatible with Standard, Wide Mouth and Flex Sip Bottles