A dip tube comprising: an elongate hollow tubular member extending from an innermost inlet end to an outlet end, the tubular member having a circumferential tube wall, the tube wall having an exterior surface and an interior surface and a thickness T between the exterior surface and the interior surface, characterized by the tubular member having an outer tube portion, an intermediate tubular frangible portion, and an inner tube portion, the outer tube portion including the outlet end and extending from the outlet end to an intermediate inlet end on the outer tube portion, the inner tube portion including the innermost inlet end and extending from the innermost inlet end to an intermediate outlet end on the inner tube portion, the frangible portion bridging between the outer tube portion and the inner tube portion providing communication between the intermediate inlet end on the outer tube portion and the intermediate outer end on the inner tube portion, the frangible portion extending circumferentially about the tubular member, the frangible portion being selected such that while the frangible portion is intact, on application of a threshold tension force between the inner tube portion and the outer tube portion across the frangible portion, the frangible portion breaks, with the frangible portion intact, the interior surface of the tube wall defining a sealed continuous long interior passageway through each of the outer tube portion, the frangible portion and the inner tube portion of the tubular member between an outlet opening at the outlet end on the outer tube portion and the innermost inlet end on the inner tube portion, with the frangible portion broken the interior surface of the tube wall over the outer tube portion defining a sealed continuous short interior passageway through the outer tube portion between the outlet opening at the outlet end on the outer tube portion and an intermediate inlet opening being at the intermediate inlet end on the outer tube portion, the intermediate inlet opening open through the tube wall of the outer tube portion to the exterior surface of the tube wall at the intermediate inlet end. an elongate hollow tubular member extending from an innermost inlet end to an outlet end, the tubular member having a circumferential tube wall, the tube wall having an exterior surface and an interior surface and a thickness T between the exterior surface and the interior surface, characterized by the tubular member having an outer tube portion, an intermediate tubular frangible portion, and an inner tube portion, the outer tube portion including the outlet end and extending from the outlet end to an intermediate inlet end on the outer tube portion, the inner tube portion including the innermost inlet end and extending from the innermost inlet end to an intermediate outlet end on the inner tube portion, the frangible portion bridging between the outer tube portion and the inner tube portion providing communication between the intermediate inlet end on the outer tube portion and the intermediate outer end on the inner tube portion, the frangible portion extending circumferentially about the tubular member, the frangible portion being selected such that while the frangible portion is intact, on application of a threshold tension force between the inner tube portion and the outer tube portion across the frangible portion, the frangible portion breaks, with the frangible portion intact, the interior surface of the tube wall defining a sealed continuous long interior passageway through each of the outer tube portion, the frangible portion and the inner tube portion of the tubular member between an outlet opening at the outlet end on the outer tube portion and the innermost inlet end on the inner tube portion, with the frangible portion broken the interior surface of the tube wall over the outer tube portion defining a sealed continuous short interior passageway through the outer tube portion between the outlet opening at the outlet end on the outer tube portion and an intermediate inlet opening being at the intermediate inlet end on the outer tube portion, the intermediate inlet opening open through the tube wall of the outer tube portion to the exterior surface of the tube wall at the intermediate inlet end.