DD, it's easy. Any personal items that are creams, gels, lotions or glosses have to be put in a 1 qt. baggie and can not exceed 3 oz. They will allow slightly over 3 oz., but they don't advertise it.
This means small toothpastes, liquid lipsticks etc.
Now the TSA is taking bags, not the counter reps, so a suggestion is keep the baggy in one of your outer pockets of your luggage if you are checking it, and if it is carry on, you have to take it out for examination.
I checked one suitcase last week, and my baggie was opened and sprawled all over the outer case, so they are really going through the bags thoroughly. I would take the 1 qt baggie with me on my carry on.
You and Mr. DD are allowed one 1 qt baggy each.
They do not seem to be concerned with lipsticks that are not liquid. I had 1 in my purse.