A container for a dosing system which can be positioned in the interior of a dishwasher and comprises a dosing device by which at least one preparation can be dosed into the interior, wherein the container has at least one chamber for receiving the preparation, and a connection piece connected to the chamber for connecting the chamber to a connection receptacle in the dosing device, characterized in that the connection piece comprises a main part which has an air chamber to ventilate the chamber, and an air chamber wall, wherein a projection is integrally formed on the air chamber wall and has a contact point, spaced apart from the air chamber wall for an abutment on the connection receptacle, so that a force acting on the contact point of the projection, when connecting the connection piece and the connection receptacle, generates a bending moment that causes the projection to rotate and an opening to be torn in the air chamber wall.