The Oiva mug is made of brown stoneware, which is dishwasher, oven, microwave and freezer safe. The outside of the mug is naturally rough with no glaze while the inside has a matt black glaze. Please note that variations in tone and color are naturally occurring characteristics of brown stoneware, making each product charming and unique.

Please remove the sticker from the bottom of the product before use. The sticker contains a small amount of metal.