Bottle of lube--311 bag.

Little packets--while I've never tried to carry them through security I have found them completely incapable of detecting small containers of liquid (a liquid medicine that came packed in ampules) even in large quantity. After forgetting to declare them (and forgetting the pack of them I stuck in my laptop bag) a couple of times and them not noticing I quit declaring them and never once drew a bag check. That was 5ml/ampule, a total in excess of a liter when we went to visit her relatives.