These 6 little bottles are made of transparent uraniuym glass, that will shine a soft green hue when under UV light. These bottles are from the second half of the XiX and were mainly used in French wineyards near Paris, in order to protect young grapes from weather and insetc attacks. They can be repurposed for decorative goals, or simply let under a UV light in a cabinet of curiosities. Blown by mouth, each bottle is unique. Quick deliuvery. Comprehensive packaging. Please check my other items to save on shipping costs.