Trombone mouthpiece case, for one. I have several, so I'm offering this one for sale. This is a handmade item by Mami Miyazaki, a trombone player known for her Mima Pouch. Canvas case for trombone mouthpieces, with a white, yellow, and black design. - Color: White, yellow, and black design - Material: Canvas fabric - Features: Mouthpiece case Thank you for looking.