Yes, toothpaste is considered a liquid when flying and must be within the 3.4oz (100ml) limit for liquids in order to bring it in your carry-on bag. Any amount larger than that must be checked with your luggage.
Because the TSA considers the nut spread a liquid, plane passengers must limit the amount they bring in their carry-ons. Like all other liquids, passengers are limited to 3.4 oz or less of peanut butter in their carry-on bag, but can also put the snack in their checked baggage.
Peanut butter may seem like a safe item since it's food, but the TSA considers it a liquid, so you're restricted to anything less than 3.4oz/100 ml allowed. You can still bring in jars, but it'll have to be less than the allowed limit.
Is Mascara Considered a Liquid by TSA? TSA counts mascara as a liquid, so the 3-1-1 rule for packing it in hand luggage applies. It states that all liquids have to be in 3.4 oz (100 ml) bottles or smaller and packed in a 1-quart bag. Mascara usually isn't above 3.4 oz, so you're free to pack it in your hand luggage.
So, the verdict on peanut butter: delicious liquid. If you plan to make a PB&J sandwich mid-flight, count on bringing 3.4 ounces of liquid peanut butter or less. And the same goes for its liquid cousin, jelly.
Deodorant can be considered a liquid when flying if it is in a gel or aerosol form. If your deodorant is solid, though, the TSA will let you bring a standard stick of solid deodorant with you in your carry-on luggage.
Foods considered liquids and gels, including nut butters, hummus and soft cheeses, must comply with TSA regulations. That means that no individual liquid food item can be over 3.4 ounces. All of your liquid and gels, including foods and toiletries, need to fit in a single quart-sized bag.
United is committed to the safety of its customers, including customers with major food allergies. United does not serve pre-packaged peanuts on our flights.
The TSA's liquid limit for carry-ons—known as the 3-1-1 rule—allows travelers to pack liquids, aerosols, gels, creams, and pastes under 3.4 ounces (100 milliliters) in their carry-on bags. Passengers are allowed up to one quart-sized bag per person, or roughly nine 3.4-ounce containers in a single quart-sized bag.
Safety Razors: Because the razor blades are so easy to remove, safety razors are not permitted in your carry-on luggage with the blade. They're fine to pack in your carry-on without the blade. The blades must be stored in your checked luggage. The same applies for straight razors.