Begin by rolling out a slab for the base of the pitcher and cutting out the desired shape of the floor. Measure the circumference of the base. An easy way to do this is wrap a long sheet of paper around outer edge of the base. This will result in a slightly too-long measurement, but this excess is easy to trim later, as desired. If building a pitcher with multiple wall surfaces, measure each side.
Roll out the slab for the wall(s). In the example pitcher, the wall was created using a single long slab, which was allowed to overlap at the juncture without being smoothed into itself.
Let the slab walls dry enough to support their own weight when joined to the base. Score and slip all joints, including where the wall rests on the base and where walls meet. Place the walls and weld the joints, using small coils of clay at the seams as necessary. Use a paddle or long wooden tool to reach the interior of tall, narrow pitchers.