I highly recommend Lawson's "Cup of Rice (Fried Rice with Chicken)" for a drive or picnic! Good, cheap, and easy to eat - also "Cup of Rice (Chicken Rice with Chicken)" like a children's lunch!
Cup Gohan (Fried Rice Chicken) and Cup Gohan (Chicken Rice Chicken) released by Lawson are very excellent! They can be held in one hand and eaten with the other, making them perfect for outdoor activities and road trips. And they are cheap and tasty..!