Same happened to us flying out of Costa Rica.

In Copenhagen water was OK to take on the plane.

Depends on the country. Flying to both places we brought our own plastic bottles in carry-on, and filled with water after security.

This has been true on international flights on US airlines for several years. When this policy first went into effect, we'd bought an expensive bottle of cognac at duty free in Bangkok, and were carrying it on board. They allowed us to go back to the duty-free store and get a refund. The only other option was to gate check it.

This is my understanding

It should not matter whether the airline is US or internationally owned. The no liquids in the cabin rule applies for any flight traveling to the US (other than the 3 oz in the baggie thing).

If you buy something in duty free, it needs to be delivered on to the plane and not carried on.

If you are transferring within the US inside the secure area (after TSA screenings), you should be able to carry on liquids that you buy at the airport. However if you have to go thru another screening before you board, expect they may remove it.

Anyone know any different?

<<<If you buy something in duty free, it needs to be delivered on to the plane and not carried on.>>>

That's not because of the liquids rule, it's because of the tax (duty) rules.

I thought the rule was no liquids more than 3 oz. brought from "pre-security". I'd never heard of the no liquids in the cabin at all rule before.

This is news to me.

I routinely fill my water bottle after security in Seoul when flying to the US. The trick is to remember to empty it when deplaning in Seoul from Singapore, as you have to go through security again and then re-board the same plane, but there are shops and water fountains after security and no one checking at the door of the plane (yet).

I've had the same experience in Tokyo, Beijing and Singapore on flights inbound to the US on both international and US carriers.

I guess I'll find out next week, as I'm flying from Australia to the US via Singapore and Seoul.

AFAIK, Only US airlines restrict duty free liquids on their international flights (except for duty-free you buy onboard). Foreign Carriers flying to the US still allow duty-free liquid purchases on board.

In the past, the issue of whether duty-free had to be delivered to the plane or whether you could carry it from the duty-free shop had to do with the set up of each airport. The issue of allowing duty=free liquids on board is not related to this issue.

I don't know how they will treat your carry-on water.

I should add that I had filled my "favorite" water bottle with water from the Dubai airport lounge which is located after security. When I arrived at the gate, they had another security screening where I had to remove my shoes, get a pat down, and all liquids (over 3 ounces) were removed from my bag. They wanted to throw out my favorite water bottle. I almost poured the water all over the floor. Glad I didn't, but they should have a way to dump the liquid and return the water bottle.

Is this a US government rule or a rule by the foreign airports. In most foreign airports, flights to the US get special screening; some of it just for spite about the idiocies imposed by the paranoia of the US government (for example, Heathrow security is excellent and I am screened very thoroughly before entering the departure lounge. Requiring extra screening on flights to the USA in a way are saying we don't trust you guys, or am I missing something?)



Anyway, just last month I was in the departure lounge and picked up a sandwich waiting for my flight to be called. I then went to another story and they had a special (not so special for peope used to US prices but for Great Britain,,,) ib ,5 kuters if cije,,,3 fir tge oruce if 2, /so I bought 3, drank 1 with my sandwich and took 2 in my carry ons. Nobody asked, nobody checked and I was totally unaware there is any issue with stuff bourght after screening. Or is it just an airport policy and Heathrow doesn't bother? No signs either prohibiting it.

Were you already through screening when you bought your items and then did not have to pass another screening?

Obviously if you have already passed all the screenings then you are done. The problem usually happens when you assume that you are done with screenings, and try to carry something you've bought in the terminal through a secondary screening.

I believe Qantas does this on flights to the United States since they are listed as a high security flight.

There was no security check at the gate when I flew MEL-LAX on QF last year.

Same is true in Mexico. You can't bring liquids (bottled water, soda) on the plane with you even though you bought it after security.

I was told that it's because many other countries don't have the 3oz rule. If they don't check for liquids at security, then they have to do the check at the gate for flights going to the US. Thus you lose any liquids you've picked up in the airport since they have no way of knowing if you brought it in from outside or not.

I don't remember security in Buenos Aires caring about liquids so it would make sense that they then have to check for all of the flights to the US.


<<<Were you already through screening when you bought your items and then did not have to pass another screening? >>>

In Buenos Aires it was at the gate that they did another screening and took liquids away.

Here is some info I found on the TSA site re duty free and the 3 oz rule. A friend lost an expensive bottle of perfume bought at duty free, but I can't remember if she was coming or going between the UK and the US.

http://blog.tsa.gov/2008/05/duty-free-debunked.html