An arrangement for the rapid preparation of various products that can be encapsulated is proposed, comprising a capsule (10) which contains a concentrated dose or an exact measure of a suitable given product to be diluted (a) and a container (20) suitable for receiving an amount of a given dilution product (b). The capsule (10) is a disposable element having an outlet (11) provided with detachable closure elements (12). The container (20) having a lower opening (21) with reciprocal connection means (22) capable of forming a firm airtight bond with the opening (11) of the capsule (10) and an top opening (23) adapted for receiving the dilution product (b) and dispensing the mixture (c) comprising the metered dose (a) and dilution product (b).