(e.g. archery) sharp objects, even small ones, including dart arrows and razor blades The recommendation allows for light knives and scissors with blades up to 6 cm (2") but some countries do not accept these either (e.g. nail care items) blunt objects, clubs and all larger sticks, including sports utilities (e.g. skateboard) inflammable objects, including ethanol, alcoholic beverage above 70%, some match sticks toxic chemicals, including pepper spray, liquid batteries, blood samples United States The United States Transportation Security Administration (TSA) has introduced a series of restrictions effective since 26 September 2006 under the name "3:1:1" for liquids. Restrictions on liquids: 3.4 ounce or smaller of containers for liquids and gels (100 ml) 1 quart-size clear plastic zip-top bag holding the liquid contents (approx. 950 ml) 1 bag per traveler shown openly in the security bin the TSA guidelines explicitly accept the metricized portions of 100 ml / 1 liter as defined later in the European Union the list of exceptions for liquids (baby milk, diabetes diet) is identical to EU guidelines. The TSA has additional restrictions for security searches: for example, the baggage should not be locked (except with a special luggage locks that TSA staff can open), gifts should not be wrapped, and shoes may be required to be taken off during body search with the metal detector. Food items in the luggage may be mistaken for dangerous material triggering an intensive search. See also Suitcase Checked baggage Baggage allowance Notes References External links Carry-On Luggage Size Chart by Airline Allowed cabin sizes per airline Hand luggage size and weight restrictions by airline Luggage