Everything about life changes inside of prison, from a person's daily schedule to the ways they're allowed to use the Internet. That new lifestyle also changes what prisoners use instead of money. Paper currency isn't typically allowed, which means inmates have to get creative with their finances.

So what do prisoners use instead of money? Food is a popular choice. Ramen noodles are worth their weight in gold, and spices and instant coffee can be useful bartering tools, too. But it's not just physical items used as currency in prison - sex is sometimes traded for goods on the inside as well. And that's not to mention the other unbelievable things smuggled into prisons and used like cash.

Things that serve as money in jail may seem worthless to those on the outside, but after spending time in the clink, they'd be bartering stamps and cigarettes like the rest of them.