5 d the plate 5 is inserted into the cavity 35 and pressure is applied downward on the plate 5 until it fits snugly into place in the cavity 35 alternatively the plate 5 can be adapted to snug fit into the cavity 35 by providing a flange not shown at the edge of the plate 5 when a user needs to remove the plate 5 the user can grab a bar 7 protruding from a corner of the plate 5 as shown in fig1 and 7 and pull the plate 5 upward until it is removed from the cavity 35 the bar 7 may include a group of bars to assist in grabbing the bar 7 the plate 5 may also have markings forming two rulers 6 a and 6 b for example the ruler 6 a may be in centimeters and the ruler 6 b may be in inches for example when the plate 5 is removed the rulers 6 a and 6 b can be used to measure different objects thereby obviating a need to have a separate ruler fig8 is a top front and right side perspective view of the pail a with a handle in an upper position and a plate inserted in the cavity 35 in the cover 2 the lid 23 which is in the closed position and the opening 24 are covered by the plate 35 and therefore not shown in fig8 fig9 is a cross sectional view of the cover 2 along lines 9 9 in fig8 with the plate 5 inserted in the cavity 35 some details of the cover 2 are omitted in fig9 the side 5 b of the plate 5 rests against the wall 39 b and.