A pine box, that's all
When we surveyed U.S. Catholic readers last March about their last wishes, a few noted that they wanted to be cremated to avoid being pumped full of chemicals.
There's another option, however: natural burial. No embalming, no fancy casket, no big concrete vault; just a shroud or pine box lowered into the ground. The body returns to the earth within months, as nature intended, according to a National Catholic Reporter article.