The Crackle Vase tall blue is recycled glass and each piece will be unique in design and have color variation from light blue to dark blue. The Crackle collection has an expressive, sculptural exterior created using an old handicraft technique in which the hot glass is dipped in ice-cold water. The circular glass that Crackle Circular is made of, makes the products different in color, and the small bubbles created during the process of making recycled glass into a new product, make each vase unique.