All THETIS ceramics are hand-thrown, hand painted with clay based slips and the colours emerge during firing. The slips are produced by carefully selecting and processing natural clays. The color and texture of the decoration depends on details of the firing. The shades of red, brown and black are achieved by following the ancient manufacturing process known as the iron reduction technique which involves successive stages of firing in oxidizing and reducing kiln atmosphere.

The products include ancient toys (dolls, marbles, astragalus bones, iynx, spinning tops, figurines), excavation and conservation kits, jewelry, tableware (drinking vessels, plates and other black glazed pottery from the Ancient Agora),cooking pots and artifacts inspired by the prehistoric pottery of the Cyclades and Thessaly.