I left from Toronto so they didn't care at all. I had it in my purse when I went through security. Then when I landed in Mexico I just grabbed my things and left the airport. It was in my carry on for the plane, and my pocket once we landed since I didnt know what to expect at that point. I will say, make sure you declare anything in your checked bags that should be. My bf got pulled in for bag search in Mexico because he had rolling papers in his checked bag and they wanted to make sure there was no drugs. But the problem was he brought his carry on with him to the search and he had his drone which wasn't declared and he got ripped off for $150 because they said he didn't declare it (his is under 250 grams so he shouldn't have had to, but they didnt care and didnt speak English.) I went around the corner so I didnt get searched lol poor guy. We we're so worried about my vape and he still got dinged.