About Annieglass: As durable as it is beautiful, Annieglass takes its shape in a fiery kiln, draped over a ceramic mold at melting temperature and permanently fusing the precious metal and color into the glass and assuring a tarnish free and chip resistant product of the utmost quality. Annieglass is dishwasher safe when used with a mild detergent. Dry with a soft cloth to guard against hard water and mineral deposits. Avoid abrasive cleaners or materials. Annieglass is not recommended for oven or microwave use.