In a world where resources are scarce, a toothbrush can be more than just a tooth-bringer. With a little ingenuity, it can become a trusty signal stick.
Use the bristles to create a makeshift flag, signaling for help or marking trails. The handle can serve as a hammer for breaking open shells or crushing small rocks. And the head can be used as a... well, that's a secret.
Other uses for a toothbrush signal stick include: