This wooden water whistle lets you enjoy changes in tone using a cup! I used it as a sound effect when practicing the toy symphony! I bought two, and since this one is unused, I'm offering it to someone who needs it! - Type: Water whistle - Material: Wood - Accessories: Instruction manual ★ How to use: Fill a cup about halfway with water, put the tip of the water whistle about 2 cm into the water, and blow. You'll hear a beautiful "pyuro-roro~" sound! - Features: Enjoy changes in tone! Currently decluttering my music room. Thank you for looking.