Direct Cremation but if you don't mind your body going out of your family's control donating your body to science or a body farm for forensic anthropologist. It can be free.
Came here to say this; cremation is the cheapest that leaves your family with an object; leaving your body to science can be zero-cost (costs paid by the institution of choice).
I've signed up for donation for dissection. One slight caveat is that the institution - in my case a medical school - can decline to take your body if you've died of something infectious or if it's been too damaged, eg in a crash. If all goes well, they collect the body, and when they're finished with it they have it cremated. Family can have the ashes if they want. There's a nice memorial garden with the names of donors. It's all free... I mean, this is the medical school where Burke and Hare sold their murder victims, so they're quite grateful to get your corpse for nothing.
Seconded on donating. It was free when I needed it for a family member and they sent a really lovely memorial letter. It listed all the things the donations went to like helping to restore sight in a veteran. You also still receive the cremated remains afterwards. Its a great option.
Depends on where you live. In Germany the government will of course take care of the burial of no one else does it, but parents or children are responsible for whatever burial cost is left after using the estate, even if they refused the inheritance.
Just in case you're serious, taxidermy is not a good option if you want a faithful representation of how you look like. Taxidermy often results in not exactly the same look something had when they where living because replicating exactly the bones and cartilage to put the skin over is not easy.
This is OK for some random wild animal you don't care about representing the individual it once was, but for pets it usually results in unsatisfactory results, and for people it's just very uncanny because our brains are very good with human faces.
Thanks. That’s kind of you and I appreciate it. I was being humorous but I did start to wonder if would make a comically gruesome feature for a funeral.
We decided not to get a pet taxidermied in the past for the same reason you mentioned.
Although by far the eco friendly option, natural (or direct) burials are still quite expensive, at around $2600. Most of this is related to the cost of the plot itself, and most of the savings come from using a cheaper/no casket.
Direct cremation is generally cheaper, being $800 - $3000, with most options averaging around $2000.