For retail businesses that rely on frozen supplies—such as grocery stores, convenience stores, and ice cream shops—power outages can be a major risk.

Using dry ice also helps to prevent freezer burn — an important thing to know how to spot in your food. It's caused by the moisture present in regular freezers, and dry ice circumvents this pitfall.

note that the best ice to use is actually dry ice since it has a much lower temperature than regular ice. You can often buy dry ice at your local grocery store, but never touch it with your bare ...