Here is a nifty gadget that lets you cook rice in your car. The Thanko Car Rice Cooker & Lunch Box cooks and keeps your food warm. It can get the job done in 25 minutes. It has 0.18L capacity. This rice cooker is 110W rated.
The Thanko Car Rice Cooker has an aluminum, silicone, and PC construction. You can find out more about it here.