> Researchers excavating the sunken ruins of Thônis-Heracleion have discovered an array of archaeological treasures. (Christoph Gerigk © Franck Goddio / Hilti Foundation)

That is obviously not a wicker basket. It looks like red-figure pottery.

Compare this quote from the article:

> Other objects found on or surrounding the tumulus included ancient pottery, bronze artifacts and figurines depicting the Egyptian god Osiris.

> “We found hundreds of deposits made of ceramic,” Goddio tells the Guardian. “One above the other. These are imported ceramic, red on black figures.”