What is hidden in 3D image?

A man driving a Kia stops at a traffic light next to a Rolls-Royce.

The Kia driver rolls down his window and calls out to the Rolls-Royce driver, "Hey, pal, that's an impressive car. Does your Rolls have Wi-Fi? My Kia does!"
The Rolls-Royce driver replies, "Yes, it has Wi-Fi."

The Kia driver continues, "Nice! And do you have a fridge in there? I have a fridge in the backseat of my Kia!"
The Rolls-Royce driver, getting irritated, responds, "Yes, there's a refrigerator."

Not backing down, the Kia driver asks, "That's cool, man! What about a TV? I've got a TV in my Kia's backseat!"
The Rolls-Royce driver, increasingly annoyed, says, "Yes, there's a television. A Rolls-Royce is the epitome of luxury vehicles!"

The Kia driver says, "Amazing car! But, do you have a bed in there? I've got a bed in the back of my Kia!"
Frustrated that his car lacks a bed, the Rolls-Royce driver speeds off. He heads straight to the dealership and orders a bed to be installed in his Rolls. The following morning, he picks up his car, and the bed looks fantastic, complete with silk sheets and elegant brass accents. It's undoubtedly a bed suited for a Rolls-Royce.

The Rolls-Royce driver spends the entire day searching for the Kia. Finally, late that night, he spots the Kia parked with fogged-up windows. He gets out of his Rolls-Royce and knocks on the Kia's window. At first, there's no response, but then the owner pokes his head out, dripping wet.

"I now have a bed in the back of my Rolls-Royce," the Rolls-Royce driver declares smugly.
The Kia driver replies, "Did you really drag me out of the shower just to tell me that?!"