Please help me find more information on these Villeroy & Boch bowls.

I know that they are made by Villeroy and Boch in Luxembourg.  I've done days of research on the internet and came up empty on any further definite information.  The only other mixed pastels I found under Villeroy and Boch were dip trays from the Festival Ware Set, but their shape doesn't match and they are solid pastels unlike my bowls.  (My bowls are yellow, green, gray and pink on the outside and white on the inside of the bowl.)  I found these at a local thrift shop and the owner thought they might be rice bowls.  I'm not even sure if they are bowls or open oven casserole dishes or dip trays or what else?