Originally Posted by jasonvr

I'm confused by your statement. At least in the US, the TSA specifically calls out contact lens solution (well, saline in particular) as a permitted medical liquid in any quantity. The individual TSA employee doesn't have any say in the matter unless they are trying to make up rules (as they are known to do). At that point you ask for a supervisor and point them to their own website.

I have no idea how you got thru TSA security with a bottle of water, unopened or not. Every airport I go thru has big garbage cans right at the security screening filled with bottles of water that were discarded.

Now, full disclosure - I just went and looked at the websites of FRA and BKK and NEITHER of them have an exemption for contact lens solution, though I swear I looked before and they were allowed. However, in both locations, I only had my small bottle with because I knew I had SIN to deal with in the future, thus the big bottle was in checked luggage. I think the long trip with a lot of airports has made my memory a little faulty