Thermos
One day a blonde went into o Walt-Mart and saw something she liked.
“What is this thing?” She asked the clerk.
“A thermos.” The clerk replied. “It keeps hot things hot and cold things cold.” The blonde bought one, and brought it to work the next day.
“What is that thing?” asked her boss, who was also blonde.
“A thermos. Keeps the hot things hot, and the cold things cold.”
“Interesting,” her boss replied, “what do you have in it?”
“I’ve got coffee and a popsicle inside.”