Money soap is a bar of hand soap with random amounts of real money inside. Most bars have $1, but you may get one with $5, $10, $20 or $50. It’s so tightly rolled you won’t know until you use up the soap. There are about 100 reviews from verified customers on Amazon, and there are a decent amount that report something other than $1, and a few that say they got $50. It’s a great white elephant gift, and probably the most exciting bar of soap anyone has gotten as a gift.