Vintage Melamine Mixing Bowls Nesting Set of 4 bowls with 3 Lids Vintage

These are vintage bowls. The lids are 5.75" in diameter, 6.5" in diameter and 7.5" in diameter. The large blue bowl is 10" in diameter. It has wear marks (I assume from mixing batter) and one small stain (please see photos). The exterior appears blemish, scratch and stain free. , The next bowl is lavender in color and 8" in diameter, there is wear from using to mix and a small darkish ring at bottom of bowl. I tried to photograph it but it is pretty faint. The exterior is scratch, blemish and stain free. The next bowl is a peachy orange. The interior has evidence of use (to mix something) and is stain free. The exterior is scratch, blemish and stain free. The last bowl is yellow and 5.5" in diameter. It has very little wear on interior and no staining or blemishes. The exterior is scratch, blemish and stain free. The rubber ring on the base is missing.