A zǐ shā hú is a traditional unglazed teapot made from purple clay (zǐ shā) mined near Yixing in Jiangsu Province, China. The name breaks down literally as 'purple' (紫), 'sand/clay' (砂), and 'pot/teapot' (壶). This distinctive clay is rich in iron and porous, allowing the pot to absorb tea oils over time — enhancing flavor with repeated use. Each teapot is handcrafted using age-old techniques, often by master artisans, and is highly valued for both functional brewing qualities and artistic merit.

Zisha teapots are deeply embedded in Chinese tea culture, especially in gongfu cha (ceremonial tea preparation). Collectors prize them for their craftsmanship, provenance, and aging potential: well-used pots develop a lustrous patina and subtle aroma. Authentic pieces are never mass-produced or glazed, and the clay’s natural color ranges from purplish-brown to cinnabar red. While 'Yixing teapot' is the common English term, 紫砂壶 specifically refers to the material and origin, not just any ceramic teapot.