I don't know much about the 16th century Mr. Gerard David, but...

I know he had this one cool basket:

because he used it in more than one painting.

Had I not seen the top picture, I wouldn't have known what was in the basket in the other.
It's Mary's "diaper bag"!

Someone on Pinterest, collecting images of baskets, wrote this:

"Just when you think the Nantucket Basket is a purely American style, you find one in a 15th century Netherlandish painting in the MET. "

She also had the full ID on the painting:

Gerard David | The Nativity with Donors and Saints Jerome and Leonard | The Met
Date: ca. 1510–15 Gerard David - Detail from The Nativity with Donors and Saints Jerome and Leonard.

More of baby Jesus and grapes by other artists

or

a collection of art stuff