According to the instructions on the tin of the only tooth powder I’ve seen in real life, you dipped your toothbrush into the tin. It was round and shaped like a coffee can. The lid didn’t have holes in it that would be needed to sprinkle the stuff out. Also that powder wouldn’t sprinkle at all, it had hardened into a rock of the stuff. You would have needed a chisel, and mortar and pestle to use it by the time I found it
… you didn’t ‘dip your brush’ into tooth powder, you dusted it onto the bristles…
According to the instructions on the tin of the only tooth powder I’ve seen in real life, you dipped your toothbrush into the tin. It was round and shaped like a coffee can. The lid didn’t have holes in it that would be needed to sprinkle the stuff out. Also that powder wouldn’t sprinkle at all, it had hardened into a rock of the stuff. You would have needed a chisel, and mortar and pestle to use it by the time I found it