Tupperware bowls vented lids 3 sets (Swarthmore)

Three sets of nesting Tupperware bowls. One set of 3.5 cup, 2.5 cup and 1.75 cup sizes with red, blue and green interchangeable lids. One set of same sizes all with blue lids. The largest bowl of this set looks like it was used to microwave food and is stained. One set 6.25 cup and two 4.25 cup bowls with blue, red and green lids.