Liquids, aerosols and gels, in limited quantities, are safe to bring aboard an aircraft. Each traveler is allowed one 1 quart bag in order to limit the total volume of liquids, aerosols and gels. Consolidating products into one bag and X-raying them separately from the carry-on bag enables security officers to quickly clear all items. 3-1-1 for carry-on luggage = bottle of 3.4 ounces (100 ml) or less (per volume); 1 quart transparent plastic bag hermetically sealed; 1 bag per passenger placed in the inspection container. One quart size bag per person limits the total volume of liquid that each passenger can carry. The 3.4 ounce (100 ml) container size is a security measure. Be prepared. The line of passengers will be delayed each time TSA inspects a carry-on baggage, Abiding by the 3-1-1 application will guarantee a fast and easy experience at the checkpoint. The 3-1-1 application is for short trips. If you are in doubt, place liquids in checked baggage Declare larger liquids. Medically required liquids, such as baby formula and food, breast milk and medications are allowed in excess of 3.4 ounces in reasonable quantities for the flight. It is not necessary to place medically required liquids in a zip-top bag. However, you must tell the Transportation Security Officer that you have medically necessary liquids at the beginning of the screening checkpoint process. Medically required liquids will be subjected to additional screening that could include being asked to open the container. We recommend, but do not require, that medication be labeled to facilitate the security process. We suggest Go Toob no leak 3 oz containers .