I personally wouldn't but them in anything air tight...

In the past I've put freshly picked fruits on a screen in front of a dehumidifier overnight with excellent results (cracker-dry by the next morning).

For what it's worth I've never had them dry with as much bluing as in your previous picture.  Could it be they got moldy in the air tight container?  Can you see any type of trich or anything growing on them?

Seriously a fan and a screen to lay them out on in the open air is all you need.  They WILL dry out completely eventually when dried this way.  In my experience dessicant is completely unnecessary but to each his own.