Receta Happiness is a Warm Bottom - French White/Bleu/Bisque and Classic Black F2MWCR Cradle

Evidently, the Granite piece absorbs microwave energy and heats up, thus warming the bottom of your dish warm, hence keeping the casserole, held within, piping hot while serving. Probably a little safer than the previous candle warmers had been.

I tried multiple pieces, but it really is designed specifically for the F-2 Casserole; none of my others fit into it.

My assumption is that this was originally available as a set with a French White F-2 because of the era it was made, but it's possible it was still available with French Bleu and French Bisque. I do not, however, believe this product was available after the late 80s, meaning that it predates the Classic Black (1990). Though I am not completely certain of that. Then…