All liquids must be in containers no larger than 3.4 ounces, and all liquid containers must fit into a one clear quart size bag. This includes any liquid, including carry-on toiletries and over-the-counter cold medication. Gels are considered liquids for purposes of travel.

Under current TSA and international security regulations in 2026, you cannot bring a 10 oz bottle of lotion in your carry-on luggage, even if the bottle is only partially full. All liquids, gels, and aerosols must be in containers of 3.4 ounces (100ml) or less and must all fit into a single, quart-sized, clear plastic bag. If you have a 10 oz bottle of lotion, it must be packed in your checked luggage. The only exceptions to this "3-1-1" rule are for medically necessary liquids (like insulin or saline solution) and breast milk or baby formula, which must be declared to security officers for separate screening. If you attempt to bring a 10 oz bottle through security, it will be confiscated and disposed of. To avoid this, many travelers buy "travel-size" containers and decant their favorite lotions or simply purchase a full-sized bottle at their destination after passing through the security checkpoint.