I've had the exact same thing come with a TQFP keyboard encoder I purchased from Mouser.
They just cut the tray down to the number of ICs that I ordered and then saran wrapped it to keep the ICs in place.
Pink is for electronics.
Hmm, I remember I had a calendar once with a girl wrapped in pink saran wrap, otherwise not so clothed. I wonder what her voltage was?
I thought the pink or clear thing was a joke. I laughed. Then I remembered getting some pink baggies with parts in them, so now I feel silly.