If you’re looking for the simplest way to do your laundry on the go, this plastic zipper bag might be the answer to your problems.

Created by Japanese company Kao, the Attack Zero laundry bag is a 5-liter zipper bag designed to help users do the laundry pretty much anytime, anywhere. All you have to do is open the zipper lock put your dirty laundry inside along with some detergent – it comes included with the bag – and fill it up with water. Then close the zipper, shake the Attack Zero bag to make sure the laundry is nice and soaked, and then gently rub the bag as you would if you were washing the laundry by hand. Finally, unscrew the small valve on the side of the bag and spill the dirty mixture out. Then add fresh water to rinse the laundry and repeat the process as many times as necessary.

The Kao Attack Zero laundry bag may seem like a rudimentary product, and it is, but that’s what makes it perfect for a variety of situations when simplicity is just what the doctor ordered. When you’re out camping in the middle of nowhere, a smart washing machine isn’t going to do you much good. In the event of a natural disaster, when electricity isn’t available, a plastic bag does the job just fine.

According to the few people who have shared their opinions about the Kao Attack Zero bag, the device is good for up to 10 rounds of laundry, which isn’t half bad.