My family has owned a stainless steel steamer for a long time with a single raised vent to let steam into the upper compartment. It's great because there's no way for food to get into the bottom compartment so it (mostly) never has to be washed. It only ever contains water.
I really want to buy one of these but the only steamers I can find for sale have a perforated bottom in the upper compartment. Does anyone know where I can buy one or if any company still manufactures these?