What makes some tableware suitable for direct heat?

A

Among POTPURRI products, only Eld skillets are suitable for direct heat.

Direct-heat cookware uses specially developed heat-resistant clay and glaze materials. Ordinary tableware does not have the materials or construction needed for direct heat and may crack or break if placed over a flame.

Eld skillets can be used for grilled dishes, ajillo and more. Do not heat them empty, and read the product page's precautions before use.