It seems you can cook a single serving of rice in the microwave in 8 minutes, making it a possible substitute for a rice cooker. I haven't used it since I bought it, but I did look inside, so the box is open and has some sun damage. Please understand that it has been stored at home. 【High Heat Retention】 THERMOS insulated lunch boxes have excellent insulation performance, keeping your warm rice warm for a long time. 【Convenient Size】 With a capacity of approximately 360ml, it's the perfect size for lunch. It's also easy to carry and can be used in various situations. 【Durable Material】 Made of polypropylene, it's lightweight yet durable. It's an item that can be used for a long time. - Brand: THERMOS - Model Number: JBS-360 - Material: Polypropylene - Color: Black - Capacity: Rice (approx. 360ml) - Usage Notes: Not microwave safe Thank you for viewing.