A dispenser, comprising: at least one container, comprising a hollow basic body with a distal outlet opening and with a proximal actuating opening, wherein the basic body is made from mineral glass, and a plunger arranged in the basic body so as to be displaceable along a longitudinal direction in order to dispense from the container a flowable product that is present in the basic body, wherein the outlet opening is closed off by means of a first separable seal that has been integrally sealed onto a first supporting surface that surrounds the outlet opening, and wherein the actuating opening is closed off by means of a second separable seal that has been integrally applied onto a second supporting surface that surrounds the actuating opening; a container holder that receives the at least one container by insertion from a proximal side in a distal direction at least in part, wherein the container holder comprises a piercing element in order to penetrate the first seal when the container is moved in the distal direction in the container holder; and an actuating element which is configured to interact with the plunger in the interior of the basic body of the container in order to dispense the product from the container, wherein the actuating element comprises at least one separating element that is designed to penetrate the second seal. at least one container, comprising a hollow basic body with a distal outlet opening and with a proximal actuating opening, wherein the basic body is made from mineral glass, and a plunger arranged in the basic body so as to be displaceable along a longitudinal direction in order to dispense from the container a flowable product that is present in the basic body, wherein the outlet opening is closed off by means of a first separable seal that has been integrally sealed onto a first supporting surface that surrounds the outlet opening, and wherein the actuating opening is closed off by means of a second separable seal that has been integrally applied onto a second supporting surface that surrounds the actuating opening; a container holder that receives the at least one container by insertion from a proximal side in a distal direction at least in part, wherein the container holder comprises a piercing element in order to penetrate the first seal when the container is moved in the distal direction in the container holder; and an actuating element which is configured to interact with the plunger in the interior of the basic body of the container in order to dispense the product from the container, wherein the actuating element comprises at least one separating element that is designed to penetrate the second seal. a container holder that receives the at least one container by insertion from a proximal side in a distal direction at least in part, wherein the container holder comprises a piercing element in order to penetrate the first seal when the container is moved in the distal direction in the container holder; and an actuating element which is configured to interact with the plunger in the interior of the basic body of the container in order to dispense the product from the container, wherein the actuating element comprises at least one separating element that is designed to penetrate the second seal.