This art mug is for display and not for beverage use. It is a handmade piece of pottery with olive green glaze. The white is liquid clay that has been dribbled on after first firing.
Looks like a thrown piece and the handle is part of the form, not applied separately. Do not plan to use this as a drinking mug. The inside has some tiny glazed over lumps in the bottom that might be hard to clean and you shouldn't put this in the dishwasher. It is 5 inches tall. No chips, cracks or damage.