how many ounces can you take on a plane

How many ounces can you take on a plane internationally ? Toothpaste, shampoo, conditioner, mouthwash, and lotion are examples of common travel goods that must abide by the 3-1-1 liquids guideline. You made the duty-free liquid purchases abroad, and now you're on a connecting trip to the US. All liquids (including gels like toothpaste) and some meals that qualify as liquids must be kept in separate containers with a maximum capacity of 3.4 ounces. You will need to remove them from your suitcase and place them in a container at the airport security checkpoint, where they will be X-rayed and occasionally further examined.