Eastman Tritan (TM) Copolyester jar. THE OMNI CONTAINER COMES WITH A MULTI-PURPOSE BLADE AND LID. THE BLADE HAS 6 VERY SHARP KNIFES MADE FROM A STAINLESS STEEL ALLOY (JAPANESE PRODUCTION). THE SIZE OF THE JAR IS 64OZ. EFFICIENT BLENDING (MARKED TO) IS 50 OZ. THE RUBBER LID HAS A 1" HOLE WITH A REMOVABLE CAP. (May fit also other mixers- inquire).