Frisbees were first flown at Yale and it was pie tins from the Frisbee Pie Company.
I thought you were kidding, but it’s true:
“In 1957, the Wham-O toy company, had the rights to a plastic flying disc design, called the “Pluto Platter”. To capitalize on the craze over the pie tins, known colloquially as “Frisbies”, they took the same name for their toy, changing the spelling to “Frisbee” to avoid trademark infringement.”