how many oz of liquid is allowed in plane?
<answer> 3.4 ounces of liquid is allowed in plane. <context> When it comes to bringing liquids or gels aboard an airplane, you are allowed to bring 3-ounce (actually 3.4 ounces or 100 ml) containers filled with the shampoos, liquid soaps, mouthwash or other liquid items of your choice within their carry-on luggage. If you have larger containers that only have 3.4 ounces of liquid in them, that will not work.