1960s Tupperware Set of 5 Colored Nesting Bowls with Lids and Baking Mat

Five different colored bowls with lids, all seal well. The baking mat is from Tupperware also and is marked 1965. The bowls nest and are pretty pastel colors, the largest is green (approximately 9 inches across), then peach (approximately 8 inches across), then yellow (approximately 7 inches across), then blue (approximately 6 inches across), then pink (approximately 5.5 inches across). There are no cracks or breaks on any these pieces. The mat is approximately 22 inches across and 18 inches in height. It is soft and supple yet, with no discoloration or cuts through it. The bowls are in very good shape, some are like new, although the green bowl shows a bit of wear and the blue bowl has a bit of bubbling on a 2 inch section inside the bowl as shown in the last picture (from something hot there). The lid of the largest bowl fits fine, although when not snapped in place, it does not lie flat. These have been living in the back of a cupboard since they were last used in the 1970s.