DW bought a gadget about 10 years ago and it's still in use today. Plastic unit about 10" in diameter, bottom pan about 1" deep, main dish about 4" deep with many holes in the bottom, top lid has a slot for steam to escape. 1/2 " of water in the bottom steams veggies and taters perfectly. Have never seen another one since we purchased this unit. Sort of like a rice cooker but better. Think she got it on Home Shopping.