i usually recycle the ones i get from purchasing corals online = profit lol. you can buy fedex boxes and get the foam insulation from home depot and line the box with it, or buy from uline. heating packs i get from amazon, i have prime. i use the uline 40 hour heat packs. i took it one step farther and got those plastic acorns you see in the kiddy vending machines at grocery stores. drill a hole in the top and you have a perfect dome to protect the coral in shipment from being smashed.