Why is peanut butter considered a liquid by TSA?

You may not be nuts about it, but TSA considers your PB a liquid. In carry-on, it needs to be 3.4oz or less, the TSA said via posts on Twitter and Instagram. The agency says peanut butter fits its definition of liquid, which it declares as something with no definite shape that takes the shape of its container.



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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.

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Solid foods, including peanut butter and jelly sandwiches, are allowed in carry-on bags with no quantity limitations or packing requirements.

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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.

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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.

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Jar of peanut butter
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.

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There is no limit to the amount of food you can bring on board, as long as it can fit in your carry-on luggage! You can also pack your food any way you'd like — in a lunch bag, in resealable plastic bags, in Tupperware, etc.

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In the eyes of TSA, peanut butter — even the crunchy kind — falls under its liquids rule and is allowed in carry-on bags only in amounts 3.4 ounces or less; anything more can go in checked bags.

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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.

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Yes, you may pack food in your carry-on or checked bag, but remember all food must undergo x-ray screening. Foods that are liquids, gels, or aerosols must comply with the 3-1-1 liquids rule. TSA officers make the final decision on whether certain items are permitted into the secured areas of the airport.

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Firearms, ammunition, and fireworks are prohibited, as are all knives and safety razors (including pocket knives and Swiss Army knives). Straight razors and replacement blades for straight razors are also not allowed. Most tools also cannot be packed in carry-on luggage, as they have the potential to cause harm.

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Is there a process? TSA makes every effort to reunite passengers with items left behind at the airport checkpoint. Lost and found items retained by TSA for a minimum of thirty (30) days, and if not claimed, are either destroyed, turned over to a state agency for surplus property, or sold by TSA as excess property.

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10 TSA-Approved Snacks
  • Trail Mix.
  • Beef Jerky.
  • Cheese & Crackers.
  • Veggies & Hummus (under 3.4 oz)
  • Sandwich (use individual packets of mayo or mustard)
  • Nuts.
  • Granola/Protein Bar.
  • Muffins/Baked Goods (no jelly, cream, or custard-filled donuts)


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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.

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