Abstract: Provided is a closure device for closing an opening having at least one first closure part and at least one second closure part interact, in a magnetically attracting manner, in such a way that the opening is closed in a closed position of the closure device, and for releasing the opening the first closure part and the second closure part are displaceable into an open position, counter to a magnetic force applied by the first and second closure parts. The closure device includes at least one hold-open mechanism, via which the first and second closure parts are locked in the open position, and which counteracts a displacement of the first and second closure parts into the closed position, by means of a holding force.

Abstract: A closure device includes a first closure part, which includes a base element and at least one closure element movably arranged on the base element with a form-fitting portion arranged thereon, and a second closure part, which includes an engagement element with an engagement portion formed thereon. In an open position of the closure device the first closure part and the second closure part are separated from each other and can be attached to each other along a closing direction for closing the closure device. The form-fitting portion of the at least one closure element can be brought into engagement with the engagement portion of the engagement element in an engagement direction substantially transversely to the closing direction. On the at least one closure element of the first closure part a first magnetic element is arranged and on the engagement element of the second closure part a second magnetic element is arranged.

Abstract: Provided is a drinking bladder, including a hollow body for receiving a liquid, which includes a closure device with a closure compound. The closure compound can be adjusted from a release position, in which the first and second closing portions can be properly separated from each other against a magnetic force applied by first and second closure parts to clear an opening on the hollow body, by folding or rolling the first and second closing portions at least once into a closing position. The closure compound disposed in its closing position is secured via a securing mechanism.

Abstract: It is provided a closure device includes a first closure part and a second closure part, which can be placed against each other along a closing direction, are held against each other in a closed position, and can be detached from each other for opening the closure device. The second closure part includes a housing element with a bearing opening and a rotary element rotatably mounted in the bearing opening of the housing element. The rotary element is operatively connected to an actuator element and can be rotated with respect to the second closure part for adjusting the actuator element along a winding direction. The first closure part includes a first toothing device the second closure part includes a second toothing device, and in the closed position of the closure device the first toothing device and the second toothing device are in engagement with each other in such a way that the first closure part and the second closure part are positively held against each other along the winding direction.