The Coin of Harmony, however, might be different.Developed with the goal of purifying water, the compact coin (it fits in most water bottles) is made of silver and copper and is incredibly easy to ...

Coin of Harmony Water Purifying Coin, $40 at ShopHQ. Shop It! American pioneers, for example, were known to place silver or copper coins in water barrels to ensure the contents remained drinkable.

You freeze a cup of water and then place a coin on top of it. The position of the coin after a power outage will tell you how long your power was out according to the Tiffy Taffy website. No Grid ...

If you evacuate because of a storm, here is one thing that you can do to help ensure you and your family members don’t get sick after returning to your home.

"Make sure you freeze a water cup, then put a coin on it, and this way you'll know if you lost power," Zalak said. If you come back home and the coin is still on top of the frozen cup, then good ...