An information presenting device. The device is arranged to be capable of assuming a first flattened configuration, for transport or storage, and of assuming a second extended and hence self-supporting configuration. The device comprises at least two panels joined together along the respective edges of at least two of the panels such that the device, having assumed the second configuration, forms a hollow cylinder, and at least one locking member, arranged between the panels 4, for continuously adjustable locking of the device in the first or second configuration, the locking member comprising a first part and a second part, the first part being slidably connected to the second part and the locking member being self-locking by a friction band coupling formed between contact surfaces of the first part and the second part of the locking member.