Set of 4 Folio Art Glass Coasters With Violets Preowned Perfect Condition The Folio product has evolved from stained glass windows and Tiffany reproductions to painted, kiln-fired, and fused glass pieces. Fused glass is their latest enterprise, and it is finding a new audience among patrons who are looking for both function and durability in their glass designs. Unlike traditional art pieces, fused glass is meant to be more than merely decorative. From candle holders to serving platters, fused glass is both food and dishwasher