Bowls are a type of bell but on the contrary, to make them ring they have to be supported on a base. You have to rub the deck against the sides of the bowl to make it vibrate and in turn this. In practice, Buddhists use bowls as a support for meditation and prayer. The use of these bowls in Tibet is the main subject of many debates and stories. Some people say they are used for meditation while others say they are magical tools for the transformation of oneself and one's problems.