For parents, part of the joy of Christmas is knowing your children will behave in the days leading up to Santa’s arrival. But when you grow up, the scary possibility of finding coal in your stocking instead of presents has been fairly nonexistent, until now: Lush Cosmetics decided to bring back the sooty gift this season. But it’s not quite what you think. Though it may appear to be a pile of gross black rocks, their Want to Believe Bath Melt is actually a beauty product, made from soy milk and cocoa butter meant for a delicious bathing experience. It will soften the skin while also providing a great Christmas morning prank. Actually, it could be the most perfect gift for a frenemy.