Use your snow shovel to fill the plastic tote with snow. Make sure the snow is tightly packed. If the snow is not tightly enough packed it will not support the weight of the body or fall apart. Once you have a tightly packed block flip the tote upside down and tap the the top to loosen the snow block. Grip the handles or sides of the tote a gentle wiggle the tote until the block comes free.
You will need to make four of these snow blocks and position them in a rectangle as seen in the picture. It is okay if there are gaps between the snow bricks as you will fill them in the next step.