If you are wondering what a Goober is, there is a picture of one here.

A goober walks up to the return counter at Walmart and says to the clerk, "I'd like to return this thermos."

"Is it defective?" replies the clerk.

"Yes," says the goober, "it does not work the way it's supposed to. I was told it would keep hot things hot, and cold things cold and it doesn't do either."

"What did you put in it?" asks the clerk.

The goober says, "Two cups of coffee and an ice cream sandwich."