These square Corningware containers were all earned at a Seattle gas station--I can't remember if it was Atlantic Richfield, Mobilgas, or Standard Oil, but I do know we made a point of using a specific station in the late sixties because I wanted a free set of these versatile storage containers. And here I am almost sixty years later and I STILL have them, and they are none the worse for their constant wear. I've used them multiple times every week for decades and prefer them to any other containers for food storage. They withstand the freezer, the oven, and the microwave (which was still years away from being known about or available to the average person). I love these little dishes.
Nowadays, I'm embarrassed to be seen standing at a gas pump. I should be biking, walking, bussing or driving my electric car. At the very least--my car should be a hybrid. The days are long gone where I will be rewarded for buying a full tank of gas. But I will never forget proudly earning little square Corningware dishes as a result of consuming gasoline, and I'm happy I did.