In Brzeg, Poland, Ewa and her team shape each stoneware bubble mug from their native clay before using carved sponges and fine brushwork to adorn it with colorful tulip motifs. Each piece is then glazed and high-fired for everlasting beauty. Microwave, oven, dishwasher, and freezer safe. Handcrafted exclusively for Uno Alla Volta, from the hearts and hands of the artisans. Dimensions - 3.5'' tall, holds 11 oz.