When is a purified water can still be unsafe?

When a purified-water canister is being sold, the company is only testing it to make sure it’s clean.

The purity of the water is not tested.

But it’s still considered safe to drink.

When a water purifying canister comes into contact with your skin, that’s a risk, said Dr. Daniel Ahern, a dermatologist and dermatology professor at the University of California, Los Angeles.

But the most common risk is that the canister could get contaminated with the bacteria that cause skin problems like acne.

Ahern said there are a number of ways to minimize contamination.

He suggests using a non-flammable container or washing it thoroughly with soap and water before use.

And avoiding contact with people and pets, such as using a disposable filter and not storing it in the refrigerator.

“The beauty of using a purified canister, is that it is not contaminated by anything that could potentially cause problems with your health,” Ahern said.

For now, Ahern says, the best bet for avoiding bacterial infections is to keep a clean, clean canister at home.

“You should be taking your canister with you everywhere you go, whether it’s on a plane, whether you’re at a restaurant, whether someone’s in the bathroom,” Ahenn said.

“You should keep it in a cool place.”