His blonde secretary had never seen one before.
"What's that thing?" she asks.
"Oh, this?" he says, "It's just my thermos. It keeps my hot things hot and my cold things cold. Damn convenient."
"Oh wow, that DOES sound convenient!" she exclaims, "I might have to get myself one of those!"
"Yep, I definitely recommend it."
And they go about the rest of the day.
Sure enough, the next morning, when the boss comes in, he notices a brand new thermos on his secretary's desk.
"Ah, I see you got yourself a thermos!" he says.
"Oh, yes sir, I decided I could use something to keep my hot things hot and my cold things cold." She's beaming.
He grins back. "Neat-o. So, whatcha got in there?"
"Two popsicles and a cup of coffee."