These porcelain vases are ideal for cuttings from your garden. They are fired with a unique crystal glaze, which are notoriously difficult to perfect. They form in the same way as ice crystals, but instead of forming at freezing temperatures, they form at 2,000 degrees Fahrenheit. The nature of crystal glazes is variation, so each vase has a different pattern of crystals. I strongly suggest that you visit me in my studio to choose the mug you like the most. This also avoids the hassle and expense of shipping.