I have never travelled overseas, so have absolutely NO IDEA how duty free works.
My mum is travelling Sydney - Singapore - Frankfurt - Riga.
Then coming home in about 3 months time Riga - Frankfurt - Hanoi - Sydney.
I'm wanting to ask her to look for some expensive moisturiser duty free in Singapore, but to make it worthwhile, I would want a large size (240ml).
Can she do this, if she'll be taking it in her carry-on?
I know everything changed again recently, and I tried googling it, but I think I've just made myself more confused.