I purchase this for a friend . I think -lrb- at this price -rrb- it would have a stainless steel interior cooking bowl and interior . Poor assumption on my part . my friend will not eat from anything with a aluminum surface so I end up keep it for myself . the unit have a aluminum lid the bowl be aluminum that be coat with a non-stick surface inside and out . it be very easy to clean . it be a top quality unit no doubt . the interior bowl be mark for water level and you get a scoop with a prescribe size for the unit . I have cook white rice , brown rice and steel cut oatmeal in it . for my like the white rice need more water than the bowl measure request . my origional thought be the unit be too expensive for what it do but I like it very much . after one year of use , I can not say that there be another appliance that I have enjoy and get so much use out of . I be a fan of this appliance beyond word . the rice be always the same , perfect . I add a little extra water for my liking .