A cart is provided. The cart includes a plurality of walls to define an internal volume and a top surface. The top surface comprises a planar portion that is enclosed by edges along its perimeter, some or all of the edges including upstanding portions that extend above the planar portion. One or more of the upstanding portions includes an open portion proximate to the intersecting adjacent edge that forms a gap therebetween. A plurality of caps are provided, with a cap disposed upon each corner to contact the planar portion and the upstanding portions of the edges and enclose the gap in each corner.