Recently I was on a plane and decided to reapply lip gloss before we landed. The pressure of the plane made the gloss explode and worst the metallic sheen of the gloss penetrated my clothes and leather bag. This can happen with any cosmetic, so how will you know ahead of time?

1- Tubes are culprits: so squeeze out all the air before you get on the plane, close quickly.
2- You may also tap containers of all kinds, it to get the air to the top before you open them.
3- Use solids, as in lipstick vs. gloss, solid cream vs. liquid moisturizer.
4- Zip lock it all and open over the sink.
5- Take caps off, cover with a second layer of plastic wrap, then put into zip
lock bags, and if still concerned, double zip lock.

Rather than describe the TSA policy: here is the rule from TSA’s site:
It is called 3-1-1.

Liquids, aerosols and gels, in limited quantities, are safe to bring aboard an aircraft. Each traveler is allowed one bag in order to limit the total volume of liquids, aerosols and gels. Consolidating products into one bag and X-raying them separately from the carry-on bag enables security officers to quickly clear all items.

3-1-1 for carry-ons = 3.4 ounce (100ml) bottle or less (by volume); 1 quart-sized, clear, plastic, zip-top bag; 1 bag per passenger placed in screening bin. One-quart bag per person limits the total liquid volume each traveler can bring. 3.4 ounce (100ml) container size is a security measure.

Be prepared. Each time TSA searches a carry-on it slows down the line. Practicing 3-1-1 will ensure a faster and easier checkpoint experience.

3-1-1 is for short trips. If in doubt, put your liquids in checked luggage.

Declare larger liquids. Medications, baby formula and food, and breast milk are allowed in reasonable quantities exceeding three ounces and are not required to be in the zip-top bag. Declare these items for inspection at the checkpoint. Officers may need to open these items to conduct additional screening.