Sponge is the best tool when you use foundation fluid to smear the nose, mouth, eye and hair. For example, if you use a sponge to rub blush, the effect is very good. When you are playing the background, you can first put a few basic colors on your face, then use a sponge to wipe it evenly. You can also use a sponge to modify the lip color. You can first apply lipstick, and then sponge it gently until the color becomes softer.