Tired of a roommate never replacing the toilet paper roll? Make not swapping in a new roll of TP impossible with this inventive toilet paper holder.

But the reality is that those little sanitary rolls are one of ... costs of the $30 billion toilet paper industry worldwide. Mandi edited the personal finance vertical for Business Insider until ...

Install it facing upward so at least two toilet paper rolls can be stacked per bar. If there's enough vertical space, install ...