A disposable device for collection of uncontaminated urine samples from small children comprising a sterile container with an inlet that eliminates direct contact between the wearers skin and the inside of the container, and which is initially closed by a delaying mechanism consisting of, e.g. a water soluble adhesive substance or material. The flow to the container is initially hindered by the delaying mechanism located in the inlet of the container. This causes the initial portion of fluid, which may be contaminated with bacteria, to be absorbed by an absorbing layer whereafter the inlet is automatically opened so that the remaining fluid can reach the container essentially uncontaminated.