This viking mugs is made of fine polyresinoutpart and 304 stainless steelliner.hand painted and polished individually. non-toxic, safe, durable and hygienic Since each cup is hand-painted, the color may be slightly different from the picture, which is normal. Each mug comes with individual safety packaging to ensure that it won't break when you receive it. 18oz Large capacity can be used to drink beer, coffee, juice, etc. Since the exterior is hand painted, we recommend hand washing the cup. There are many more styles and capacities available in our store.