Become a tree
The Bios Urn is "a biodegradable urn made from coconut shell, compacted peat and cellulose" which comes with a tree seed. After you die, someone packs your remains into the thing (which looks like a Big Gulp) and presto -- you start to grow. Then if your loved ones decide they want to join you, you might become a beautiful dead people forest. Aw. Or there are these flowery biodegradable coffins now... a super stylish way to decompose. How morbidly sweet.