The rules for carry-on-sized toiletries in the United States are set by the Transportation Security Administration (TSA). Toiletry size rules are consistent around the world. The rule for toiletries is 3-1-1: 3.4 ounce (100ml) bottles or less (by volume) 1 quart-sized, clear, plastic, zip-top bag 1 bag per passenger
It can be challenging to remember what items you can and can’t carry onto airplanes. Create packing to your flight a breeze by following this guide based on the Transportation Security Administration’s rules and regulations designed by Srilankan airlines.
TSA now has an app. Also on this link, is a "can I bring my..." search box. You enter the item you're not sure about and it will tell you 1) if you can bring it and 2) if you can bring it in your carry on. Handy!