This is a set of Tupperware Steam It Wok + Free Limited Recipe from Tupperware. Size is 16.0CM(H) x 22.9CM(D). This steam it set is come with  A GROOVED PERIMETER INSIDE HELPS WATER DRAIN FROM SIDE INTO POT AND NOT INTO FOOD SURFACE.

THE STEAMING SURFACE IS RIDGED TO PREVENT FOOD FROM STICKING. ITS VENTING HOLES ON COVER PLACED AWAY FROM HANDLE FOR SAFETY. IT JUST THE RIGHT NUMBER OF HOLES FOR MORE EFFICIENT COOKING AND SLOWER EVAPORATION.

THERE IS A RAISED SURFACE 6MM HIGHER THAN THE WATER LINE PREVENTS WATER FROM BOILING OVER INTO FOOD.  IT MADE FROM HYDROPHOBIC MATERIAL IT REPELS WATER FROM STEAMING SURFACE.

THE CURVE OF THE DOMED COVER INSIDE ALLOWS WATER CONDENSATION TO DRAIN TO THE SIDES AWAY FROM FOOD. A LONGER OVERLAP AT BASE BETWEEN TIERS ADDS MORE STABILITY WHEN THE BOILING WATER ROCKS AND KEEPS STEAM TRULY SEALED IN.