Good Gift Certificates/Giftcards for a Maui tourist?

[mmmmangos]

A co-worker of mine is heading to Maui with her family in a few months, and I'd like to get her a vacation-related present for the holidays. She's been many times before, so no need for a guidebook, and they like to eat in their rental condo because she has a young daughter and they're on a budget. Any suggestions for a thoughtful, inexpensive gift?

I'm posting here because I'd like it to be food-related, but it doesn't have to be. I know I could get her an ABC Store certificate, but would appreciate other ideas. Da Kitchen won't mail me a gift certificate! LOL. (I live in CA, and my co-worker vacations in Kihei, in case that helps.)

Mahalo, y'all!