We have one bowl,which gives shank sound and cukoo sound which could be heard upto 200 mtrs. you have to first wash it and filled with some water. when you rub your finger straight, it gives shank sound when you rub the side of your finger, it gives cukoo sound free presentation, if you are from antique background. please send your offer on sumit78k@yahoo.com with rate you offer. we could send you the video also if your offer suit us.