All of my rectangular Raku containers are decorated by glaze and or hand carving. The floor of the container is centered allowing almost all of them to be inverted so as to provide many variations and are often used for freestyle arrangements whether they expand or contract as the arranger desires. Note: I sell my containers in their most natural state fresh from the kiln. No chemicals or sealants are introduced post firing. The Raku process allows for some porosity in the finished structure so if you plan to use for extended display it is always wise to place them on a waterproof surface or pad. A simple rinse is all that is needed when you are finished with the container. Set it aside to dry thoroughly before storage. Allow your container to age with grace, avoid water dyes, dishwashers, harsh cleaners or scrubby pads and your container will return to you all that you have put into it.