Annieglass is durable, dishwasher safe, and chip-resistant (although not recommended for oven or microwave use). Colors and textures will vary due to our handmade process. To ensure authenticity, every piece is hand-engraved with our studio signature and dated. If your piece features one of Annieglass’ most iconic designs: a hand-painted band of precious metal, this metal rim is permanently fused within the glass during Annie’s perfected kiln firing process. This metal rim will not chip or wear off.