? This Witches Brew cauldron mug is made of high quality porcelain. CA Prop 65 Compliant. Our traditionally crafted pottery are made of the highest quality porcelain available and fired at a high temperature to maximize the strength of the porcelain, making them superior to other ceramics in the market. Our earthenware collections are more resistant to cracks, stains, and scratches. Our porcelain is food safe and contains no lead or cadmium. ? This Witches Brew cauldron mug is double walled for higher durability and ease of cleaning. The set is food safe, dishwasher and microwave safe. ? This Witches Brew cauldron mThis Witches Brew cauldron mug measures 4" High, 5.25" Wide and 4" in Diameter. It holds 14 fluid oz.ug is double walled for higher durability and ease of cleaning. The set is food safe, dishwasher and microwave safe. ? Double, double, toil and trouble: Fire burn and cauldron bubble! You can create your own magical brews in this bone china witches brew cauldron mug. It might be more suited to a cup of tea rather than the eye of newt, however, we aren't ones to judge. ? This cauldron mug has little cauldron legs as well as a sturdy handle. The words 'Witches Brew' have been written below a crescent moon and scattered stars on both sides of the mug. This deep black cauldron mug has been finished with a clear glaze, making it shine.