This is an overview about singing bowls we propose. It contains some categories because we work directly with south of Bengali villages, which are managed by a family, who work in a close cooperation between them. Each village has a specificity. They worked metals for a very long time (at less 5 generations) and they are extremely qualified in instrument manufacturing like bowls, bells, gongs or cymbals. Most of bowls that we propose came from these workshops, Nepal and Bengali being in a close commercial cooperation.