The only vessel form reported so far for Caparra blue is the albarelo, or Spanish drug jar.
Paste is chalky and ranges from cream to pinkish-orange in color. The exterior surface is covered with solid blue tin-enamel ranging from light blue to dark gray-blue, and frequently has a specked or sponged appearance. The interior surface is covered with white or off-white tin enamel. No designs have been reported on either surface.