Abstract: A blown body or slice from differently colored or saturated millefiori glass of a given design of 5 to 30 times enlarged over the entire area while maintaining its proportionality is sealed inside a basic transparent glass 0.5 to 3 mm thick, and pre-heated so that during its attachment to a hot glass bottle made of basic transparent glass the viscosity of its contact surface is in the range of 104 to 109 Pas, whereafter, the bottle is shaped by enlarging the millefiori design while maintaining the proportionality of its design. The blank glass bottle with the millefiori is overlaid by basic glass, shaped further by heating, rolling and blowing it into a final shape and into the enlarged millefiori design while maintaining the proportionality of its design and while obtaining the final thickness of glass of the product of 0.5-3 mm in the area of the sealed millefiori.