Half a black hole

COLOUR ME embarrassed: when getting ready for work this morning I decided I take my lunch which I duly prepared and left on my backpack to make sure I didn't forget it. When I was about to leave I picked up the bag (which I hadn't taken for the last few days) and wondered why it was so heavy.

You've got it! inside there was a punnet of rather soft strawberries sitting on top of a carton of half a dozen eggs.

So that answers one of my mysteries. There's still the issue of the white shirt...