Dispenser for dispensing liquid, free-flowing or pasty media from a storage chamber, comprising a basic body, an operating element and a dispensing element, wherein - the operating element, for delivering at least one stored medium, comprises a housing and at least one functional element, between which a cavity is arranged, and - there is at least one first connecting channel provided, this leading from the basic body to a first opening, wherein the opening is arranged in the housing, and - there is at least one second connecting channel provided, this leading from a second opening to the dispensing element, wherein the opening is arranged in the housing and the first connecting channel is provided with at least one first valve and the second connecting channel is provided with at least one second valve, such - that the functional element consists of an elastomer and can be moved elastically, wherein the respective ends are fixed to the housing, and therefore the cavity is configured in a fluid-tight manner in relation to the housing, - that, by virtue of a user letting go of the functional element, a restoring force, which is obtained by the selection of materials and by the configuration of the functional element, acts such that a negative pressure arises in the cavity and the first valve opens in the direction of the storage chamber, and therefore the corresponding medium can flow onwards under the functional element, wherein the second valve closes during this time, and - that, by virtue of the functional element being actuated, the second valve opens and the first valve closes, and therefore the medium can be transported to the dispensing element via the second opening and the second connecting channel, wherein - the first valve is arranged in the first connecting channel and the second valve is arranged in the second connecting channel, wherein the two connecting channels (8, 9) are arranged within the housing and the connecting channels (8, 9) open out into the cavity by way of their openings (6, 7), - the functional element is of teardrop design in cross section and is arranged on the operating element such that that side of the functional element which is directed towards the user can be operated by means of a finger, for example a thumb, and the medium located in the cavity can be dispensed via the second connecting channel, characterized in that - the basic body comprises a follow-on element, which can be moved independently within the storage chamber of the basic body, in the direction of the first opening, and has sealing lips on its circumference in order to provide fluid-tight sealing in relation to the basic body. - the operating element, for delivering at least one stored medium, comprises a housing and at least one functional element, between which a cavity is arranged, and - there is at least one first connecting channel provided, this leading from the basic body to a first opening, wherein the opening is arranged in the housing, and - there is at least one second connecting channel provided, this leading from a second opening to the dispensing element, wherein the opening is arranged in the housing and the first connecting channel is provided with at least one first valve and the second connecting channel is provided with at least one second valve, such - that the functional element consists of an elastomer and can be moved elastically, wherein the respective ends are fixed to the housing, and therefore the cavity is configured in a fluid-tight manner in relation to the housing, - that, by virtue of a user letting go of the functional element, a restoring force, which is obtained by the selection of materials and by the configuration of the functional element, acts such that a negative pressure arises in the cavity and the first valve opens in the direction of the storage chamber, and therefore the corresponding medium can flow onwards under the functional element, wherein the second valve closes during this time, and - that, by virtue of the functional element being actuated, the second valve opens and the first valve closes, and therefore the medium can be transported to the dispensing element via the second opening and the second connecting channel, wherein - the first valve is arranged in the first connecting channel and the second valve is arranged in the second connecting channel, wherein the two connecting channels (8, 9) are arranged within the housing and the connecting channels (8, 9) open out into the cavity by way of their openings (6, 7), - the functional element is of teardrop design in cross section and is arranged on the operating element such that that side of the functional element which is directed towards the user can be operated by means of a finger, for example a thumb, and the medium located in the cavity can be dispensed via the second connecting channel, characterized in that - the basic body comprises a follow-on element, which can be moved independently within the storage chamber of the basic body, in the direction of the first opening, and has sealing lips on its circumference in order to provide fluid-tight sealing in relation to the basic body.