Item Information Annieglass is handmade on California’s central coast by a small group of highly skilled artisans and is noted for its beauty as well as its quality and strength. Every one-of-a-kind piece is proudly engraved with the studio signature. Annieglass is dishwasher safe when used with a mild detergent. Dry with a soft cloth to guard against hard water and mineral deposits. Annieglass is not recommended for oven or microwave use.