Another Idea is a Coleman type hard cooler and check it as check in luggage. I would wrap it with duct tape to keep in closed in transit and would have the roll of tape in my hand luggage in case authorities any where along the way wanted to look inside. I would fill it with things that I planned on leaving behind and buy Jamaican goods to bring home on the return as my second checked bag (Yea I know things are different now). I would give the cooler away to somebody in Negril that could use it. Back in the 70's and 80's they were hard to come by and expensive in JA. While in Negril I used it as my beer, food, etc.. cooler and would buy ice from the ice man every day.