John It's a biodegradable urn, your ashes go in the bottom, in the top goes some special soil and a seed of your choice, it's buried and the urn and you feed the tree.
I like the sound of this one a lot.
The reef sounds like a nice idea but then it also sounds like a lot of processing and we don't really know how well it works like a natural reef, the being food for a tree seed sounds much simpler and more reliable.