Pack your bag with peace of mind. When you start with Travelon's advanced packing series, World Travel Essentials, you’ll travel limitless. WTE are serious tools for serious solutions to packing challenges while optimizing the way you pack. The premium set of 3 Leakproof 3 oz. Travel Tubes offers you a convenient way to carry liquids. 3-1-1 carry-on compliant means you won’t have to give up your liquids to a TSA agent. This is especially important when carrying things like formula. These food-grade silicone travel tubes are really important for traveling Moms.