Asking close friends what they like as souvenirs/gifts
Edit:

user3306356 wrote


  Correct me if I'm wrong, but I'm pretty sure 手信 doesn't work globally in Mandarin. 


You are correct, 手信 is a Cantonese term, Don't think all Mandarin speakers know this term.

Edit 2:


紀念品 (Souvenirs) or 土特產 (native products) from other place that you give to your friends as gift is known as  "手信" in Cantonese
Since there's no equivalent in Mandarin, we can only use either 紀念品 or 土特產 in Mandarin sentences


Edit 3:

chouhy suggested '伴手禮' is the equivalent of '手信', although 手信 must came from far away place, and '伴手禮' can be locally bought, I do agree "美國帶回來的手信" in Cantonese could be translated as "美國帶回來的伴手禮" in Mandarin, because the sentence indicated the gift is from 美國, not from a local store .

~


  What/do you like anything from (Japan)?


Mandarin:

"想要什麼紀念品/ 土特產?" - "what souvenirs/ native products gift you want?" 

"想要一些(日本的)紀念品/ 土特產嗎?" - "Do you want some souvenirs/ native products gift (from Japan)?"

Cantonese: 

"想要乜嘢手信?"

"想唔想要啲(日本嘅)手信?"

Beside "紀念品" (souvenirs) 手信 are mostly "土特產" (native products/ local  products)

If you visit Toronto, the 手信 (gift) you take home for friends would be either a Maple Lefts Hockey team T-shirt (souvenirs); or a bottle of maple syrup (native products)

手信 can also be souvenirs/ native products from your home town. For example, if you are from Toronto and you are visiting Hong Kong, the gifts you give to your Hong Kong friends would also be (多倫多的)手信