My best friend at primary school and I used to bring each other a little gift from our holidays. I still have a little wooden box with coloured shells on the lid, and the name "Tintagel" painted on the side, which she brought me from a Cornish holiday over 50 years ago.
I brought home clothes, food, books, jewellery for myself as holiday mementos over the years. My parents brought my nephew a tartan cot blanket from Scotland, it's used for his own children now. I still use a letter rack they brought home from another Scottish holiday.
For other family and workmates, I would buy sweets.