Authentic Ru porcelain from the official origin region (Geographical Indication product). The glaze is made of 100% natural ores with zero chemical additives. Material & Features: Contains agate, jade, maifan stone, and over 10 natural minerals. Agate and jade help soften water; maifan stone purifies it. Tea enthusiasts report a smoother, sweeter taste when using Ru porcelain. Glaze is completely food-safe and non-toxic. ⚠️ IMPORTANT: ITEM CONDITION (PLEASE READ) Major Flaw: The mug was accidentally left in the freezer, causing a crack. It leaks and is NOT for daily drinking. Minor Flaws: There are additional minor surface damages (please refer to the photos). Ideal For: Kintsugi repair practice, tea space decoration, or collecting as a Ru porcelain specimen. Shipping & Terms: Local Pickup Preferred: Shanghai local pickup is highly recommended. Shipping Risk: If shipped, the item will be packed securely, but transit damage cannot be guaranteed. Sold AS-IS: Priced at ¥35 (Free Shipping). By purchasing, you acknowledge the flaws and accept all transit risks. NO returns or refunds.