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If you've flown over the past few years, you know how painful it can be getting through security. At this point, frequent travelers have the drill down fairly well and the lines through security, while still long, seem to move a bit more smoothly. If you don't travel often, it's important to remember the rules regarding carry-on bags.

3-1-1 for carry-ons = 3.4 ounce (100ml) bottle or less (by volume) ; 1 quart-sized, clear, plastic, zip-top bag; 1 bag per passenger placed in screening bin. One-quart bag per person limits the total liquid volume each traveler can bring. 3.4 ounce (100ml) container size is a security measure