This is an idea product that utilizes steam during rice cooking. I bought it a few years ago and loved using it, but I stopped using it when my family downsized and I got rid of my rice cooker. You can use it to make boiled eggs or defrost frozen food while cooking rice. Some adjustments were needed, like keeping the eggs at room temperature, but it was very helpful when I used to make lunches. I haven't tried it, but it seems like it's microwave-safe as well. I've uploaded photos of areas that might look like stains, so please take a look. (It was used without any problems.) It's still in good condition, so I hope someone will use it.