The .1 ounce will be fine. The actual, ultimate, per unit limit is 100 milliliters (because unlike this country, MOST of the world uses the metric system, and people from all those other countries fly to and from here, and have commercially-packaged liquids... but I digress). Anyway, 100 ml = 3.4 fluid ounces. So, yes, the OP can actually put as many as will fit comfortably, in her 3-1-1 bag.