Even a frequent traveler can get confused and confounded by the rules regarding what you can put in carry-on luggage, in checked baggage, and what you cannot bring onto the airplane. It’s all getting a bit mathematical, so don’t forget these two important rules:
3-1-1 Rule. This regards LIQUIDS in CARRY ON luggage and means that you must place all liquids and gels in containers that are UNDER 3 ounces, place them in a SINGLE clear plastic bag or pouch that is ONE QUART or less. Unless you travel very rarely it’s a great idea to have separate a separate stash of tiny bottle of shampoo, toothpaste, and other personal care items etc so you don’t have to reorganize too much every time you go. Note the rule generally includes medicines in liquid form. I think there may be an exception for medicine, but this is probably more hassle than it’s usually worth.
45 inch rule: Although it’s routinely not followed, your carry on measurement in inches is supposed to be 45. e.g. a bag 12x13x20 = 45 inches should be fine, where a bag 15x15x20 = 50 is technically too large.
I just learned that “gel insoles” for shoes are NOT allowed in carry on or in your shoes *unless* the gel is built into the shoe. Also surprising to me was that scissors are allowed in carry on as long as the blades are less than 4″. That said I wouldn’t try to bring on a pair as I’m guessing many TSA folks would confiscate them as they did with considerable fanfare when they took my daughter’s plastic barbie scissors some years back, undoubtedly landing her in some TSA database for life or on the 9 year old, 4′ 2″ watch list.
For those of us who prefer not to check baggage it’s getting a bit harder to pack because now any prohibited “carry on” items can’t simply be stuck in the checked bag. As with the 3-1-1 rule you need to be cautious or you’ll wind up getting valuable items or expensive liquids taken away.
I’m about to make a trip from Reno to Philadelphia and not sure if my electric shaver is allowed in carry on – I think yes, but no mention of that object at the TSA site.