Combi Chopstick Case This is a new, unused case for first-time chopsticks, purchased in multiple quantities. To use, first remove the gray ring from the first-time chopsticks, then insert the chopsticks. The product name indicates that it is a dedicated case for the Masher & Mini Rice Ball Spoon, so it is likely compatible with that product as well. However, I do not own the Masher & Mini Rice Ball Spoon, so I do not know the details. Please check the Combi website for more information.