These colored glasses add that certain something to your table. The hand-cut crystal glass is an overlapping glass. The overlapping technology is very complex in manufacturing. The water glass produced in the oral blowing process is not just dyed through, but the glass gets the color through the overlapping technology. One or more layers are applied to a clear backing glass. In this way, the color intensity is always maintained. Product Name: Set of 4 Marco Crystal Glasses Black Hand Cut Glass Height 9cm Capacity 0.25 Litre