Originally Posted by
iwanm
In the past I've been told that the 100ml/3oz size was brought in as anything smaller than that cannot be detected by the x ray machine.
False. At PWM in years past, they've found even the tiniest ointment tube that a friend had in her purse for years.
I've forgotten to take my Kippy bag out a number of times and nobody's said anything. I'm sure they can see it, but I think, as was suggested here, that most TSOs don't care much about liquids anymore. I had an experience at PWM, which used to be very strict, where they didn't bother with two nearly full water bottles (but on the next flight out, they did bother with some other liquids).