In what can be called the world's first "colour-changing" car, a German carmaker BMW has unveiled an innovative concept car at the Consumer Electronics Show (CES) in Las Vegas.

Watch: A chameleon or vehicle? Witness world's first 'colour-changing' car

Introduced in 1967, the machine was given various names by the British press such as 'instant cash', 'mini bank' and 'robot cashier'

The world's first cash-dispensing machine was conceived in the bathtub. Did you know?

On April 3, 1973, Motorola publicly demonstrated the world's first portable cellular phone

Motorola DynaTAC: Meet the world?s first cellphone

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Watch: A chameleon or vehicle? Witness world's first 'colour-changing' car

The world's first cash-dispensing machine was conceived in the bathtub. Did you know?

Motorola DynaTAC: Meet the world?s first cellphone