Some people use these edamame Mameshiba popping beans as a stress reliever to relax and calm their mind. The Red, Light Gold, Blue and Green have green beans inside. Tiger bean is a yellow bean inside a green pod, Black bean is a green pod with black beans, and Fermented bean is a brown bean in a green pod. The faces on the beans of the Green, Tiger, Black and Fermented styles are of Mameshiba, the soy bean dog character. Some of beans may not have the mameshiba faces, but still has cute emotional expressions. - If your popping bean get stiff, try putting a small drop of oil inside.