Slab Vessels
To make a slab vessel you must take care not to stretch the clay too quickly or it can cause your clay to be weak. First, make the clay flat wth your hands. When you think you have about the thickness you want, run the clay through a press or place rulers on either side of your clay and use a rolling pin for even thickness. At this point it is time to cut your clay into the desired shape for your vessels. Score the edge where you want to attach the pieces together. Apply some slip on the edge and press them firmly together. Smooth the rough edges and apply the finishing touches.
all images and information from: http://www.jhpottery.com/tutorial/slab.html
all images and information from: http://www.jhpottery.com/tutorial/slab.html