On our last round-the-world adventure, I had the wise idea to stash a $20 inside the soles of each of our shoes. Rare is the emergency situation that can’t be solved with a crisp American bill, regardless of what country you’re in. Unfortunately, by the time we found ourselves in one of those emergencies, the bills were so tattered that they wouldn’t accept them.

This time, I used my noodle and came up with a solution that will hopefully protect our emergency stash from Central America's rainy season. I’m pretty much the Travel MacGyver.