Airport security will confiscate any items that fall under the "Prohibited Items" list, which is primarily focused on safety and security. Most common are liquids, aerosols, and gels in containers larger than 3.4 ounces (100ml) found in carry-on bags. Sharp objects like box cutters, large scissors, and pocket knives are also strictly prohibited in the cabin. In 2026, new regulations have increased focus on "dangerous goods" such as spare lithium batteries (which must be in carry-ons, not checked bags) and certain types of high-powered power banks that exceed Watt-hour limits. Self-defense items like pepper spray and brass knuckles are also seized. Additionally, agricultural products—including fresh fruits, vegetables, and certain meats—are frequently confiscated by customs to prevent the spread of pests and diseases. If an item is confiscated, you generally cannot get it back, though some airports offer mailing services for non-illegal items like multi-tools.