Are you willing to know how many ounces you can take on a plane? As you are aware there are restrictions on how many ounces can you take on a plane. Some may find that amount odd because 3.4 ounces is equal to 100 ml. This aligns the US aircraft liquids restriction with other metric nations. People regularly neglect to include specific liquids, gels, creams, and pastes in their zipper pouch. It is regarded as a liquid if you can squeeze, smear, pump, spread, spray, or spill it. Therefore, make sure it's in your quart bag.