that its longitudinal axis is substantially horizontal that is parallel to the top and bottom surfaces and at an angle of about thirty degrees within the horizontal plane from the longitudinal axis of oblong hollow vessel body 30 such that the outer ends 52l and 52r of the handles are closer to front surfaces 62l and 62r respectively than to rear surfaces 66l and 66r respectively the portions of hand access recesses 42l and 42r immediately surrounding the handles are denoted as hand access recess midsections 44l and 44r each hand access recess midsection comprises a closed band surrounding and aligned with the handle which in a plan view fig4 has the shape of a rounded rectangle the longer sides of which are parallel to the handle each hand access recess midsection is of a proper size and shape to provide space for an easy and unencumbered grip of the handle from above or below with the user located to the front or the rear by an average to large human hand each of the hand access recesses 42l 42r are shaped to form a smooth transition between the top surfaces 40l 40r the midsections 44l 44r and the bottom surfaces 46l 46r respectively transverse members 72 and 74 are fluidly attached to and extend between primary volumes 36l and 36r the transverse members connect to the primary volumes substantially toward the tops of the primary volumes creating a substantial space below the transverse members and between primary volumes the space below.