If you want to make it through security and to your gate as smooth as possible, it is probably not a good idea to bring your packed toiletry bag along with you on the plane. In order to bring liquid onto the plane, containers cannot exceed 3.4 ounces, and they all must fit inside a one-liter ziplock baggie. If you don’t feel like breaking out your food scale to measure your shampoos and lotions (as many of us do not want to do), it would probably be a lot easier just to throw it all into your checked luggage and breeze right on through security to make it to your gate unscathed.