When packing your carry-on bag keep in mind the 311 liquids rule. Liquid, gels, aerosols, creams and pastes should not exceed 3.4 ounces, or 100 milliliters per container. This includes items such as toothpaste, gel deodorants, shampoos, lotions, and similar personal care items. Consumables like bottled water, peanut butter and jams, must also comply with the rule. All liquids must fit into one quart size clear plastic zip-top bag, and only one bag is allowed per traveler. That’s 3-1-1. There are some exceptions if you have special needs or children. You may bring prescription and over-the-counter medicines, baby formula, breast milk, juice and other essential liquids in quantities larger than 3.4 ounces. Please present these items to security officers at the checkpoint, because they may require alternative screening. For more information click on the liquids rule page at TSA.gov..