Made from real "lead free" terra-cotta that is thrown and sculpted by hand and kiln fired with protective glaze. Every mug is twice baked in a high-fire kiln at 1200* - 1500*F the 2nd bake is done in with protective glaze finish. This traditional terra-cotta and kiln firing method will hold the temperature of your hot beverage longer than normal mugs crafted from porcelain. Lead free paint and ceramic, safe to hold liquid or food. Handmade by skilled fair-trade artisans. Safe for microwave, dishwasher safe(top shelf preferred), oven safe. Hand-thrown ceramic and high fire glaze is very durable and will not erode or fade, nor easily scratch.