Mexico's Javier and Efren orchestrate a multicolored centrifugal illusion of for the design of these rocks glasses. Each glass is crafted with traditional blown glass techniques, in which artisans blow through a metal pipe while twirling it with one hand. They simultaneously shape the molten glass at the other end, expertly achieving a colorful effect. Because each piece is handmade, shape and size can vary slightly and tiny bubbles may appear within the glass. Dishwasher: use top rack only. Hand wash recommended. Product Dimension : - 3.9" H x 3.3" Diam. Product Dimension - 3.9" H x 3.3" Diam. Product Weight - 4.49 Multicolor This hand blown item may vary slightly in color, size and shape Dishwasher: use top rack only. Hand wash recommended. Free of lead and toxins