All the pottery on this page is made with an iron-free "raku" stoneware clay body and special raku glazes.  The pots are fired to Cone 06 1830°F (999°C) in an oxidation atmosphere then plunged into garbage cans filled with combustible materials where they are reduced to create the color of the glazes and matte black on the exposed clay. These are not durable pieces and are very fragile because the clay is not completely vitrified.  These pots are suitable for Decoration ONLY. 

This means they should not come into contact with food or water.  They cannot be washed (just dust with a soft cloth, or if necessary, lightly rinse - no scouring - in cool water only) and the colored glazes will fade over time, especially if they are exposed to direct light.  They are nice for dry flower arrangements, or just for decoration, but they cannot hold water.

Just using the "common sense rules" above, these pots should provide years of joyful use.