Can I bring this on a plane?

OK so i'm 15 and i'm in spain about to go back home. So there's this thing called Snus. I think its called Dip in america and you have to be 18 to buy it. Can i bring it in my hand baggage on the airport? I bought it for my dad btw

Can fake urine work for a Airline drug screen?

I've successfully used fake urine for years in the plants to pass my drug screens. Would the same urine work okay for and Airline?(southwest, united, etc.) Had anyone had experience with this specific situation? I'm a grown man and fully aware of my decisions. I would appreciate if people refrain from sending me stop smoking or get clean comments.