Square 1 1/2" Ceramic Smoke Stone. Handmade. American Flag Design. Glazed with food safe glazes. The design will not fade or come off. Kiln fired. These were very popular in the 70's. They were used to avoid burning your fingers while smoking a non filtered cigarette when it becomes short and hard to hold on to. Durable and easily cleaned with rubbing alcohol. Made in Texas since 1995.