If you are not familiar with flying and have a trip coming up for the holidays, packing your toiletries can be an adventure. Not so much in regard to what to take, but in how you pack them so they do not explode all over the place during the plane ride. Believe me, there is nothing worse than getting to your destination, unpacking, and realizing you have toothpaste and shampoo all over your clothing.
You see, air pressure has a funny way of doing destructive things to those little three-ounce containers on the airplane. If there is any air at all in the containers, they can pop open when the changes in cabin pressure. In order to avoid this from happening, try and squeeze out any air that may be in the container and then reseal it quickly. If done properly, there will actually be a small dent in the container.
You should have all of your liquid and paste items in a clear bag anyway, but take the time to seal each bottle with plastic wrap as well as putting each item in its own sealable sandwich bag. This way, if something does leak, you have contained it to the one bag and you may actually be able to save the contents (for things such as shampoo and conditioner).
If the suitcase has a side or separate compartment, wrap the toiletry bag in a towel and pack it in there. You will need to have quick access to it anyway when you go through security, but the towel and separate compartment will provide one extra layer of protection in case the items explode as the cabin pressure changes.
Last but not least, pack all of your toothbrushes and hairbrushes separately from your liquid toiletries. Many people will have some type of travel kit they use that fits all of their toiletries. Because of the possibility of leaks and items popping open, it is best to keep these items separate so they do not get ruined if something does happen to the liquids or pastes.