I remember about 10 years ago, one of the schools I worked for needed a iMac replaced and fast, so I got it for them from Sun Remarketing (don't know if they are still in business, but I doubt it). They sent in the iMac wrapped in a clamshell - plastic bubble, but the bubble was filled with Home insulating foam - the type that expands when you pump it in and it dries. It was really odd how they did it but the iMac survived, considering how beaten up the box was when it arrived!