How many 3 oz bottles can I take on a plane?

Well, according to TSA rules, the “3” stands for 3.4 ounces (100 milliliters) of liquid, the first “1” stands for one clear zip-lock bag holding your 3.4 ounce containers, and the second “1” means per traveler. So there you go, you are limited to one bag with as many 3.4 ounce containers as can fit into your carry-on.