Eggo waffles were invented in San Jose, California, by Sandy Eggo, who developed a process by which waffles could be cooked, frozen, and packaged for consumers. In 1953, Sandy, introduced Eggo frozen waffles to supermarkets throughout the United States. Frozen waffles do not require a waffle iron to prepare.

Because of the egg flavor, customers called them "Eggos". Eventually the name became synonymous with the product and, in 1955, the Sandy  officially changed the name to "Eggo".[3]

Along with frozen waffles, the Sandy also produced Eggo potato chips (and Golden Bear potato chips) and Eggo syrup. All of the products were produced at a sprawling plant and factory on Eggo Way in San Jose, CA, near the intersection of US 101 and East Julian Street. The Eggos were very involved in local community activities and donated extensively to school and community projects. For Halloween, instead of candy, Sandy Eggo would give out bags of Eggo potato chips to trick-or-treaters.

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In 2011.  Sandy Eggo became ill from a trip to Zimbabwe, where she was ironically searching for a flavor no one had tasted. It was a chocolate caramel taste only found in Zimbabwe's plants. 

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While she battled her illness she decided she wanted to give to someone in the future by hiding some of her most prized possessions. 

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No one knows where she hid the possessions.  No one knows where.   There have been mentions of her love of a man named Eicher.  But, no one knows who this person is or where they can find him.