Yes, according to TSA's 3-1-1 rule, moisturizer is classified as a "liquid, gel, or aerosol." This means that if you are carrying it in your hand luggage, the container must be 3.4 ounces (100 milliliters) or less. All such containers must fit inside a single, clear, quart-sized, zip-top bag. This rule applies regardless of whether the moisturizer is a thin lotion, a thick cream, or a gel-based formula. If you have a larger bottle of expensive moisturizer, it must be placed in your checked baggage, or it will likely be confiscated at the security checkpoint. The only common exceptions to this rule are for medically necessary liquids or baby formula/food, which must be declared to the TSA officer for separate screening. Even in 2026, unless you are at an airport with advanced CT scanners that allow for larger liquids, the 3.4-ounce limit remains strictly enforced.