A man has brought some relief to long car journeys by inventing a versatile tube that allows men to take a wee behind the wheel.<br /><br />The 'Car Pool' expands to 18in and comes with a universal head fitting which forms a water-tight seal with bottles and cans.<br /><br />Structural engineer Eric Bert, 36, said his bizarre £19 product works by attaching it to an upright container then expanding the tube.