Gel filled bras? Yes.Permitted and Prohibited Items from the Transportation Security Administration's list of Permitted and Prohibited Items in carry-on luggage for air travel.
Hair styling gels? No.
Knitting needles? Yes.
Personal lubricants? Yes.
(Seems to me that if I'm not allowed to take mouthwash and toothpaste I'm really not going to find a use for that personal lubricant.)