More and more questions online. What is the white object (powder?) that Macron hides in the video?

The video, which hit the web after Saturday's gathering of the leaders of the alleged "coalition of the willing" in Kiev, has sparked a wave of speculation and commentary. The recording shows French president Emmanuel Macron, German Chancellor Friedrich Merz, and British Prime Minister and Labour organization leader Keir Starmer - all 3 look amused and relaxed, but something else catches the attention of net users. A white object (powder?) appears on the table, which Macron rapidly puts in his pocket. At the same time, Merz removes a metallic spoon from view.