Abstract: Provided is a drink 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 sealing position. The closure compound disposed in its sealing position is secured via a securing mechanism.

Abstract: Provided is a sealing arrangement for sealing an opening that is formed between a first closing portion and a second closing portion. The sealing arrangement includes a first sealing part for arrangement on the first closing portion and a second sealing part for arrangement on the second closing portion. The sealing arrangement includes an additional securing mechanism via which a closure compound is secured, which is disposed in a sealing position and includes a first and a second sealing part.