About Vinegar or infused oil from Panama

This is exactly the sort of thing I like bringing back from Panama: small enough to fit in a bag, but specific enough to remind you where you bought it. Oils and vinegars work well when the bottle is small, sealed and wrapped in clothing inside checked luggage. I would look for it in a proper local supermarket, covered market, deli, pharmacy, gift shop or small producer rather than leaving it until the departure gate. Back in the UK, it is worth checking specialist shops first because they often stock a better version than a broad marketplace listing. It is also the kind of thing you can talk about when someone asks what you brought back, because there is usually a little story attached to where you found it.