Description With the Rainbow Collection you give your kitchen a spring-like flair in a stylish packaging. What would a cosy breakfast be without the breakfast egg, served in Le Creuset egg cups. Features Oven Suitable for microwave Suitable for freezer Do not use on direct heat source. 5 years warranty. Heat Source Suitable for Microwave Suitable for Freezer Do not use on direct heat source. Information about Le Creuset The founders of Le Creuset have dedicated their lives to making the finest cookware. Since 1925, Le Creuset has been making top-quality, award-winning cookware, whose secret composition remains the same. Each piece is made in a unique mould into which molten iron is poured from a large cauldron (called a Creuset). The result is a unique piece with its own identity and style. The pieces are then finished by hand and undergo strict quality controls. In a final step, the cast iron is then enamelled at extremely high temperatures to achieve that shiny, hard surface finish that looks so great in any kitchen.