I was the Resident Engineer on the Scion iQ.
This tiny car is a 4 seater.
With the rear seats up, there's really no trunk space.
Interesting trunk space solution.
Reminds me of what cars did in the early days (1910s & 1920s) for trunk space.
I think the word "trunk" for the rear storage space on a car comes from those early days where literally a trunk was added to the rear of the vehicle.