Is there a skincare product you absolutely must buy at the duty-free shop?

I'm spending happy days these days planning a trip to Thailand ><

It's been a while since I've been to a duty-free shop, so I'm not sure what to buy haha.

so Your Duty-Free Pick! I'm curious about this

Is there any product you absolutely must buy at the duty-free shop? Focusing on skincare!

Since I have dry skin, the first thing I look for when buying skincare products is their moisturizing function!

And first of all, the product I pre-ordered is an Estée Lauder serum.

I'm not using this myself; I bought it as a gift for my mom and aunt.

I mainly want to buy serums, so please recommend some good products!

For reference, this is the Estée Lauder serum I bought as a gift for my mom and aunt haha.