Very Convenient, Well cooked food in the first body (directly above the pan of boiling water) Allow more time for food to be cooked in the 2nd body (eg fish or other), which nessecite less cooking time. this is in the case where you use all the steamer!
Notice to readers, I cook mostly fresh vegetables, so who needs mostly a lot of cooking time. Thank you bcp, excellent product, I use every day!