Giant Rubber Lips For Slimmer and Younger Face: It doesn’t matter if you look like a complete idiot wearing these giant lips when you can get slimmer and tauter facial skin. These giant lips need to be inserted into the mouth so that they fit on your lips. All you have to do is place it in your mouth and make vowel sounds – i.e., a, e, i, o, u for a few minutes and it can give you the effect of face lift without surgery.