Can you take toothpaste on a plane?

Quick answer

In the United States, the TSA treats toothpaste as a liquid, gel, or paste. In a carry-on, each container must be 3.4 ounces (100 milliliters) or smaller, and the containers must fit in one quart-size bag.

Klyyr One+ is a 120 g tube, marked 4.23 oz. That container is over the carry-on limit. Pack the full tube in checked baggage. A partly used tube is still a 4.23 oz container.

01
Paste counts as a liquid
The TSA liquids rule names toothpaste alongside shampoo, conditioner, and lotion. If you can spread it, it goes through the 3-1-1 check.
02
One+ is over 3.4 ounces
The tube is 120 g, 4.23 oz. Carry-on containers must be 3.4 oz (100 ml) or less.
03
Empty space does not shrink the container
A rolled-down or half-used 4.23 oz tube is still labeled as that container. Pack it in checked luggage, or move paste into a smaller container that meets the limit.

TSA liquids rule and the One+ tube
Rule	TSA Carry-on	Klyyr One+ This tube
Carry-on limit	3.4 oz / 100 ml per container	4.23 oz tube does not qualify
Quart-size bag	One bag of those small containers	The full tube does not go in it
Checked baggage	Ordinary toothpaste is allowed	Where this tube belongs
Partly empty	The container size is what counts	Rolling it down does not re-label it
Decant	A 100 ml or smaller container can go in the bag	Only if that container itself meets the rule
International	Many airports use 100 ml	Check your departure airport
Tablets	Solids are a different product	One+ is a paste

The liquids rule is from the TSA. One+ size is 120 g (4.23 oz) from the product label. Officers look at the container size, not at how much paste is left. Rules outside the United States often use 100 ml. Check the airport you depart from.

Sources behind this answer

The TSA page is the rule. The product page is the container size. Together they answer the packing question.

Transportation Security Administration
Liquids, aerosols, and gels rule
Carry-on liquids, gels, and pastes must be in containers of 3.4 ounces (100 milliliters) or less, in one quart-size bag. The TSA names toothpaste as one of those items. Larger containers go in checked baggage.
Read the TSA liquids rule
Current Klyyr label
One+ tube size
One+ is sold as a 120 g aluminum tube, 4.23 oz. That is the container size to compare with 3.4 oz.
Read the One+ product page
Klyyr
Travel toothpaste
The travel collection is the same One+ tube. It does not shrink the container to a carry-on size.
Read travel toothpaste

How to choose

If you are carrying on only

Do not count on the 4.23 oz tube. Put paste in a container that is 3.4 oz (100 ml) or smaller, inside the quart bag, or buy a small tube after security.

If you are checking a bag

Pack the One+ tube in the checked bag. The 3-1-1 limit is a carry-on rule.

If you are leaving the US

The 100 ml liquids rule is common. Confirm it for the airports on your ticket. The One+ tube is still larger than 100 ml worth of container allowance.

The Klyyr One+ formula

One+ is fluoride-free toothpaste with a clearly disclosed 10% nano + micro hydroxyapatite blend, 16 listed ingredients, peppermint + spearmint, no SLS, and no artificial dyes.

01
10% hydroxyapatite
Combined nano + micro hydroxyapatite, disclosed on the label. Ten percent is not a universal efficacy threshold.
02
16 listed ingredients
Water, Sorbitol, Glycerin, Potassium Sorbate, Hydroxyapatite (nano & micro), Xylitol, Sodium Cocoyl Glutamate, Cellulose Gum, Xanthan Gum, Zinc Citrate, Aloe Vera, Mentha Piperita (Peppermint) Oil, Mentha Viridis (Spearmint) Leaf Oil, Menthol, Sodium Benzoate, Stevia Rebaudiana Leaf/Stem Extract.
03
What is not in it
0 ppm fluoride. No SLS. No artificial dyes. Sodium cocoyl glutamate is the surfactant.
04
120 g aluminum tube
4.23 oz, approximately 90 brushings. Aluminum tube, HDPE cap. Recycle where accepted locally.

In short

Yes, you can fly with toothpaste. The One+ tube as sold belongs in the checked bag.

01 Can you take toothpaste on a plane?

Yes. In a US carry-on it has to be in a container of 3.4 ounces (100 ml) or less, in one quart-size bag. Larger tubes go in checked baggage.

02 Can I bring Klyyr One+ in my carry-on?

Not the 120 g (4.23 oz) tube. It is over the TSA container limit. Put it in a checked bag.

03 What if the tube is almost empty?

The TSA measures the container, not the leftover paste. A 4.23 oz tube that is nearly empty is still a 4.23 oz container.

04 Can I move One+ into a travel bottle?

Yes, if the bottle you move it into is 3.4 ounces (100 ml) or smaller and goes in the quart-size liquids bag.

Read the full FAQ →

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Toothpaste on a plane.

Sources behind this answer

Liquids, aerosols, and gels rule

One+ tube size

Travel toothpaste