I literally haven't posted here in years... wow! Oddly enough, it's not because I forgot of its existence, but I just haven't had the time to be dilligent about finiding new and interesting ways to die... but here's one from BigThink:
This Awesome Urn will Turn You Into a Tree After You Die
The urn is made of biodegradeable materials, such as coconut shell, and is filled with peat and soil. There's a tree seed in it, and when the urn is buried, it grows into a tree. Also it looks kind of like a coffee cup: