The invention relates to metering dispensers for release of a product into a WC bowl of a toilet, comprising a fixing region which is constructed in order to fix the metering dispenser in the region of the toilet, in particular under a WC lid, and a storage container for accommodating the product. The upper opening of the monolithic piece is adapted to receive the handle of a mop. Mapping is achieved by a resource or a subscription to a resource being suitably published during initialization of a respective device, wherein the resources are stored based on keys in the decentralized network which corresponds to a logical addresses, and the resource contents represent physical addresses. Preferably, the firm but cushioning material is a flexible strap slung across the cradle and spaced above the surface of the cradle at its center region.