VANVENE Lucore Colorful People Toothbrush Holder And Utility Suction Hook, Set of 4 Pc

Is the back flat enough to use a 3M strip if I removed the suction cup?

Would these hold a toothbrush still in a horizontal position on the counter top to enable someone to put toothpaste on it 1 handed?

Of what material is the figure made?

Do they hold on, painted walls