A service system in the field of collecting human breast milk or in the field of medical drainage has a base unit assigned to an individual or an entity and at least one mobile data medium. The mobile data medium can be brought by a user into data-communicating connection on the one hand with products in the field and on the other hand with the base unit. The base unit can be brought by the user into communicating connection with an external information and data platform. The system according to the invention offers optimal care and support of users in the field.