They will ask you if you can open them. Tell them NO. Then they will swab each can and put the test swabs into a machine that tests for chemicals. When you reach the area where you put your items in the bins to get xrayed, tell the TSA agent that your husband has cans of medically necessary items liquids and a feeding tube. Just dont forget to say the formula cans are medically necessary. Those 2 words go a long way with TSA.

Before going to the airport, try to pack all the formula and liquids he will carry-on board in one small bag within another larger bag of his other carry-on items. This will make it much easier to pull out the one bag and place it in a seperate bin. Dont forget to take along a couple bottles of water to flush to tube. Buying water in the airport is very expensive and its always cold not room temperature like what most patients use for their tubes.

Since I travel frequently, I actually carry a doctors note allowing me to take water right thru the screening area. Sometimes those lines can be a very long wait. I cant wait an hour or more for a sip of water when my mouth and throat become so dry I can barely whisper. Ive only had to pull out the note twice when the medically necessary phrase wasnt good enough. To me, I find this a bit ridiculous when the agents can clearly see I have health issues when Im missing half of my lower jaw.

Dont forget to pack any of the feeding accessories right with the formula. I suggest taking a hand towel to help in case of a spill. Planes can get bumpy and accidents can easily happen during a feeding. The small hand towel can also be used to drape over the syringe during the feeding process so your husband doesnt have an audience when he tries to do a feeding.

It sounds to me like you have this all under control, Susan. Smaller airports tend to be easier to get thru. You're absolutely right, the power of social media!

Safe travels