About this item Specially formulated ink enables you to write on glass, metal, silicone, film, and coated surfaces that other markers can’t handle. Indulge your artistic side and use these as wine glass markers. They’re also are excellent fabric and ceramic markers Ink dries in seconds for smudge-proof, waterproof permanent marking, and it’ll stay legible for years Benefit from the best! These professional markers feature a durable felt tip for indelible lightfast marking that won’t fade, for long-lasting results Whether it’s work, relaxation, in the office, studio or home, Staedtler pens have a place in your life