I have little 1 ounce Nalgene bottles that I always use for shampoo and conditioner and lotion, and sample size toothpaste that's smaller than 3 ounces (the limit).
Bars of soap don't count, do they? They're solid. What if I had my solid shampoo?
I read the TSA regulations. If I had a gel-filled bra, I could wear that through security. It didn't say if the bra would be subject to inspection....and every time the regulations referred to "breast milk," I hoped they meant breast milk that had been pumped and stored in bottles.
Ahem. Stopping now.