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Why You Should Keep A Frozen Cup With A Coin On Top In Your Freezer

(CBS13) — With the possibility of more PG&E Public Safety Power Shutoffs looming, a simple tip from a viral Facebook post may help save some food in your freezer.

Sheila Pulanco Russell shared the tip three years ago, recommending you freeze a cup of water, put a coin on top, and leave it in your freezer.

For those of you that are evacuating from the coast, I just heard a great tip. It's called the one cup tip. You put a...

Posted by Sheila Pulanco Russell on Wednesday, October 5, 2016

If the coin is still on top of the ice or in the middle of the cup after your power went out, the food in your freezer may still be okay to eat. But if the coin sank to the bottom of the cup, it's time to throw out that food that defrosted.

READ ALSO: Power Outage Food Safety: What Food You Should Toss After An Outage

Of course, if you're unsure if your food is safe to eat, it's always best to throw it out.

Swipe below through photos of the Kincade Fire in Sonoma County. 

Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Embers swirl around a tree as the Kincade Fire burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Firefighters prepare to protect a structure as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 10,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Firefighters prepare to protect a structure as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 10,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A firefighter monitors the Kincaide Fire as it burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A firefighter monitors the Kincaide Fire as it burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A firefighter drives through an area where the Kincaide Fire is burning on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincaide Fire burns a hillside on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A home burns as the Kincade Fire moves through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincade Fire burns near a vineyard on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 10,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincaide Fire burns a hillside on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincaide Fire burns near a vineyard on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincade Fire burns near a vineyard on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 10,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Fire trucks drive through an area where the Kincade Fire is burning on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A cow stands on a hill as the Kincade Fire approaches on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Trees burn as the Kincade Fire burns a hillside on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincade Fire burns next to a vineyard on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Cows stand on a hill as the Kincade Fire approaches on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A fire truck drives by a burning hillside as the Kincade Fire burns a hillside on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A tree burns as the Kincade Fire burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincade Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Firefighters use a drip torch to light a back fire ahead of the Kincaide on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Firefighters use a drip torch to light a back fire ahead of the Kincaide on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
US-FIRE-WEATHER
Embers blow across a road as wind rips through the area during the Kincade Fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
A photographer takes a photo amidst a shower of embers during the Kincade Fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Embers blow in the wind as the Kincaide Fire burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Embers blow in the wind as the Kincaide Fire burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A firefighter monitors the Kincaide Fire as it burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: Embers blow in the wind as the Kincaide Fire burns through the area on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincaide Fire burns near a vineyard on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: The Kincaide Fire burns near a vineyard on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
Evacuations Issued For Parts of Sonoma County As Kincade Fire Spreads
GEYSERVILLE, CALIFORNIA - OCTOBER 24: A Cal Fire firefighter monitors the Kincaide Fire as it burns a hillside on October 24, 2019 in Geyserville, California. Fueled by high winds, the Kincaide Fire has burned over 7,000 acres in a matter of hours and has prompted evacuations in the Geyserville area. (Photo by Justin Sullivan/Getty Images)
US-FIRE-WEATHER
A home is engulfed in flames as wind and embers rip through the area during the Kincade fire near Geyserville, California on October 24, 2019.. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
A home is engulfed in flames as wind and embers rip through the area during the Kincade fire near Geyserville, California on October 24, 2019.. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
Flames engulf a home as wind and embers rip through the area during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
Embers and smoke spread over a hillside during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
Embers blow across a road during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
Embers and smoke spread over a hillside during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
TOPSHOT-US-FIRE-WEATHER
TOPSHOT - Flames approach rolling hills of grape vines during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
Embers blow in the wind during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
A firefighter lights a back fire during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
A firefighter lights a back fire during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
TOPSHOT-US-FIRE-WEATHER
TOPSHOT - Embers blow in the wind as a tree trunk glows during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
Flames approach rolling hills of grape vines during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
A firefighter lights a back fire during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
TOPSHOT-US-FIRE-WEATHER
TOPSHOT - A fire truck heads towards flames during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
US-FIRE-WEATHER
A fire truck drives past flames during the Kincade fire near Geyserville, California on October 24, 2019. - The fire broke out in spite of rolling blackouts by utility companies in both northern and Southern California. (Photo by Josh Edelson / AFP) (Photo by JOSH EDELSON/AFP via Getty Images)
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