Mugs are engraved with your choice of custom artwork. The engraving is done by sandblasting and the result is a very durable design that will never fade. The mugs are dishwasher and microwave safe as well. Please include with your order a description of the design you would like and/or photos of any custom artwork or handwriting. Feel free to contact me with any questions. Once I receive your order I will create a mock up of the design for your approval. Once you have approved the design I will engrave your mug and send you a photo of the finished work before shipping.