Why not face the facts. They are dead. Our loved ones will not continue to look the way that they looked when they were buried. There is no way to preserve the body for forever. We are a part of the cycle. We live, we die, and we contribute to the earth by becoming a part of the earth. There is no casket that is going to completely preserve our bodies for eternity. Several different types of coffins have been designed using metal, wood, steel, etc and it still comes down to the fact that we decompose, sometimes we are preserved well enough to last for years, but we will still decompose at some point. It is just a cycle of life. We are recycled by earth. We take from her and therefor when we die, we give back.