The present invention relates to an assembly comprising: a dispensing device containing at least one product to be dispensed, and a case for holding the dispensing device when the latter is not in use, this case comprising a housing in which the dispensing device is held, this housing having a lower part and an upper part widened relative to the lower part, the case being configured to receive a quantity of liquid which is sufficient for the dispensing device to be able to float in the case at least when the dispensing device is not completely full.
