Abstract: An attachment member suitable for attaching a system to a male human being's penis, said system being suitable for collecting urine from a male human being, said attachment member comprising a substantially cylindrical portion which: comprises an elastic film material, has a first opening at a first end thereof and a second opening at the other end thereof, is arranged such that at least the glans penis of a penis could be arranged inside the substantially cylindrical portion with the first opening being further from the base of the penis than the second opening, and is at least partly rolled up to assume a ring like configuration in such a way that the first opening is located inside the rolled up portion and the second opening is located outside the rolled up portion, wherein the inner diameter of the rolled up portion of the substantially cylindrical portion is less than 45 mm when the elastic film material of the attachment member is not stretched and not rolled up.