Used these bottles to hold my homemande hand sanitzer and it works great. It's the perfect size and doesn't get clogged!

These bottles are 3oz, perfect size. I read the reviews, so I made sure to fill the bottles about 3/4 to ensure they wouldn't leak. Unfortunately, they still leaked. Good idea, but ineffective product.

these are the greatest travel bottles ever! also great by the bed...

These bottles are great for carrying any liquids you need onboard when flying. Perfect size and stay closed. Easy to clean afterwards.

Do NOT buy these for air travel. They are not 3 oz, as advertised, but more like 4 oz. It would be a waste of time and money to try to carry on these bottles.

Yes, these are 3 oz each. But I had major issues with these LEAKING. Also, the silly "label" stickers slid off in the shower after the first use. I had to sniff the contents to figure out what's in them, because the colored bottles made it difficult to tell which were soap, shampoo, and conditioner!

Actually, I've carried these on planes both nationally and internationally without issue. They fit in the standard zip top plastic bag that TSA requires, and I've never had an issue even at international airports with them. The problem with these bottles is that they LEAK! Everything else in your zip top bag will be covered with whatever liquid you have in these bottles!

I used a pharmacist's 1 ounce measure to fill these and they hold exactly 3 ounces, not counting the area where the cap screws on, so they are fine for air travel.