The TSA allows liquids, gels, and aerosols in checked bags, but there are some catches. For example, if you're planning to bring a large bottle of shampoo or a giant tub of lotion, you might want to think twice. These items are subject to the 3-1-1 liquids rule, which means they need to be in containers of 3.4 ounces or less, fit in a clear quart-sized zip-top bag, and be screened separately.
Now, you might be thinking, but what about my favorite perfume or cologne? Don't worry, you can still bring it along! However, if it's in a container larger than 3.4 ounces, it'll need to be in a checked bag, not a carry-on. And, let's be real, who wants to risk spilling their favorite fragrance all over their clothes?
Carry On Liquid Rules American Airlines at Tahlia Lilly blog