Ok figured it out...
These are to cover the water egress holes at the bottom end of the doors. They prevent water staying inside the doors to avoid rusting.
Just remembered that my Toyota dealership removed these at 1000km inspection.
When I asked them about these they apologised and said that these should have been removed prior to delivery or at the delivery time as per IMC instructions.
They also reprimanded the guy who delivered the car right there & then as to why he didn't follow the SOPs.
I told them to put all these in the arm rest compartment.
Probably they failed to remove one which fell down yesterday when the driver got the car washed; having no clue he Probably placed it in the cup holder.