indner, a Polish firm, claims the annual saucy stunt using models to shift coffins has made their boxes "to die for".
But the x-rated promotional campaign has drawn criticism from the church, which says death deserves more respect.
The first calendar appeared back in 2010 and raised eyebrows in the deeply Catholic country - but it has been an annual tradition ever since.
Lindner trumpets its latest limited edition, risque wall planner as a "one-of-a-kind treat for collectors and beauty connoisseurs".
On its website, the firm says: "12 unique coffins, 12 beautiful models - they can now belong to you too."