When I die, I want my body reduced to ashes as quickly and economically as possible.
And I don’t much care what happens to the ash, since “I” was never permanently tethered to it anyway.
“Ashes to ashes, dust to dust”
I am certain I have an immortal soul.
Where that ends up, is already privately known between me and God.
Other peoples opinions are not important.
And I am certainly not going to waste money paying for an expensive burial box, when I never paid that much for a car!
By God, yes, by you, no. You're not omniscient and you won't know where you'll be spending eternity until your particular judgment, just as Scripture teaches.
"Wherefore he that thinketh himself to stand, let him take heed lest he fall." 1 Corinthans 10:12