A thermoforming machine, comprising a plastic foil providing station, a transport means for the plastic foil, and a thermoforming device, the thermoforming device comprising: a first mold comprising a first mold body and a forming cavity arranged in said first mold body; a second mold comprising a second mold body, a first pre-stretcher, and a calibration element, wherein the first pre-stretcher and the calibration element are at least partially and moveably arranged in the second mold body; wherein the thermoforming machine comprises a central processing unit and an actor, for moving the first pre-stretcher and the calibration element in the second mold body; wherein the first and second mold can be moved relative to each other for clamping a plastic foil there between; wherein the thermoforming machine is arranged - with its central processing unit and at least one actor, especially a motor - for moving the first and second mold relative to each other; wherein the calibration element is configured to locally clamp the plastic foil in between the calibration element and a wall and/or bottom of the forming cavity; wherein the thermoforming machine might be arranged - with its central processing unit and at least one actor, especially a motor - for making the calibration element clamp the plastic foil; wherein the thermoforming device further comprises a second pre-stretcher that is at least partially and moveably arranged in the second mold body, wherein a movement relative to the second mold body and towards the same forming cavity of at least one of the first pre-stretcher, the second pre-stretcher, and the calibration element, can be individually controlled by the central processing unit, the central processing unit being connected to an actor for the second pre-stretcher, characterized in that the actor for the second pre-stretcher is mounted on the first pre-stretcher, so that the actor moves the second pre-stretcher by making a relative stroke versus the first pre-stretcher, wherein the second pre-stretcher at least partially surrounds the first pre-stretcher and the calibration element. a first mold comprising a first mold body and a forming cavity arranged in said first mold body; a second mold comprising a second mold body, a first pre-stretcher, and a calibration element, wherein the first pre-stretcher and the calibration element are at least partially and moveably arranged in the second mold body; wherein the thermoforming machine comprises a central processing unit and an actor, for moving the first pre-stretcher and the calibration element in the second mold body; wherein the first and second mold can be moved relative to each other for clamping a plastic foil there between; wherein the thermoforming machine is arranged - with its central processing unit and at least one actor, especially a motor - for moving the first and second mold relative to each other; wherein the calibration element is configured to locally clamp the plastic foil in between the calibration element and a wall and/or bottom of the forming cavity; wherein the thermoforming machine might be arranged - with its central processing unit and at least one actor, especially a motor - for making the calibration element clamp the plastic foil; wherein the thermoforming device further comprises a second pre-stretcher that is at least partially and moveably arranged in the second mold body, wherein a movement relative to the second mold body and towards the same forming cavity of at least one of the first pre-stretcher, the second pre-stretcher, and the calibration element, can be individually controlled by the central processing unit, the central processing unit being connected to an actor for the second pre-stretcher, characterized in that the actor for the second pre-stretcher is mounted on the first pre-stretcher, so that the actor moves the second pre-stretcher by making a relative stroke versus the first pre-stretcher, wherein the second pre-stretcher at least partially surrounds the first pre-stretcher and the calibration element.