When people think about lowering their electricity bills, they often focus on air conditioners, water heaters, or lighting. However, one appliance quietly consumes electricity 24 hours a day, 365 days a year: the refrigerator.

Because a refrigerator never truly turns off, even small improvements in efficiency can add up over time. One popular household tip that has circulated for years involves placing a simple bowl or container of water inside the refrigerator. Supporters claim this trick can help stabilize temperatures and improve energy efficiency.

But does it actually work? And if so, how can you do it properly?

Let's explore the science behind this simple refrigerator-saving technique and several additional ways to reduce energy consumption while keeping food fresh.

Why Refrigerators Use So Much Electricity

Unlike many household appliances, refrigerators operate continuously.

Their job is to:

• Remove heat from inside the fridge
• Maintain a stable temperature
• Protect food from spoilage

Every time the refrigerator door opens, warm air enters and cold air escapes.

The compressor then has to work harder to restore the desired temperature.

Over time, these temperature fluctuations contribute to energy consumption.

The Bowl of Water Trick

One commonly suggested method is to place a bowl, pitcher, or container of water inside the refrigerator.

The idea is surprisingly simple.

Water has a high thermal capacity, meaning it can absorb and store a large amount of heat before its temperature changes significantly.

This property may help stabilize the internal temperature of the refrigerator.

How It May Help

When the refrigerator door opens:

• Warm air enters
• Internal temperature rises slightly

A container of chilled water can help absorb some of this heat.

As a result:

• Temperature fluctuations may be reduced
• The cooling system may experience less variation
• Internal conditions may remain more stable

The effect is generally modest but can contribute to improved temperature consistency.

Why a Fuller Refrigerator Often Works Better

The bowl-of-water method is based on a broader principle.

A refrigerator that is moderately full often operates more efficiently than one that is nearly empty.

Why?

Cold items help maintain cool temperatures.

When the door opens:

• Cold foods retain their temperature
• Less warm air accumulates
• Cooling recovery may be faster

If your refrigerator is mostly empty, containers of water can serve a similar purpose.

Many people use:

• Water bottles
• Sealed containers
• Pitchers of water

to add thermal mass.

Important Safety Considerations

If using this method:

• Use a clean container
• Keep water covered if possible
• Avoid overfilling
• Ensure containers are stable

Spills can create additional cleaning problems and may affect stored food.

Can Frozen Water Help in the Freezer?

A similar principle applies to freezers.

Some homeowners place bottles of frozen water inside the freezer.

Benefits may include:

• Improved temperature stability
• Additional thermal mass
• Slower warming during brief power outages

The frozen water acts as a "cold reservoir" that helps maintain low temperatures.

Other Easy Ways to Save Refrigerator Electricity

While the water-bowl trick may help somewhat, larger savings often come from good maintenance habits.

1. Avoid Leaving the Door Open

Every second the door remains open allows cold air to escape.

Try to:

• Decide what you need before opening
• Retrieve items quickly
• Close the door promptly

This simple habit can reduce unnecessary compressor operation.

2. Check the Door Seals

Worn door gaskets allow cold air to leak out continuously.

Signs of a poor seal include:

• Condensation around the door
• Visible gaps
• Doors that do not close tightly

Replacing damaged seals may improve efficiency.

3. Keep the Coils Clean

Dust-covered condenser coils force the refrigerator to work harder.

Cleaning coils periodically may:

• Improve efficiency
• Reduce energy consumption
• Extend appliance life

Many manufacturers recommend regular coil maintenance.

4. Avoid Overcrowding

While a moderately full refrigerator can be beneficial, excessive overcrowding may restrict airflow.

Proper air circulation helps maintain consistent cooling.

Food should not block:

• Air vents
• Cooling outlets
• Internal fans

5. Set the Correct Temperature

Many people unknowingly set their refrigerator colder than necessary.

Experts generally recommend:

• Refrigerator: around 37–40°F (3–4°C)
• Freezer: around 0°F (-18°C)

Extremely cold settings may increase electricity usage without significantly improving food safety.

6. Keep Hot Foods Out

Placing hot food directly into the refrigerator introduces extra heat.

This forces the compressor to work harder.

Allow foods to cool somewhat before refrigeration while still following safe food-handling practices.

7. Leave Space Behind the Refrigerator

Refrigerators release heat through their cooling systems.

Adequate ventilation around the appliance helps dissipate this heat more effectively.

Check manufacturer recommendations for proper clearance.

Common Myths About Refrigerator Energy Savings

Myth: An Empty Refrigerator Is More Efficient

Not necessarily.

Moderately filled refrigerators often maintain temperatures more effectively.

Myth: Colder Settings Always Keep Food Fresher

False.

Excessively cold temperatures may waste energy and can even damage certain foods.

Myth: Opening the Door Briefly Doesn't Matter

Repeated openings throughout the day can significantly affect internal temperatures.

Myth: The Bowl of Water Alone Will Dramatically Lower Bills

False.

The effect is generally small and works best alongside other efficiency measures.

Additional Benefits of Keeping Water in the Refrigerator

Even if energy savings are modest, storing water offers other advantages.

You always have:

• Cold drinking water available
• Better use of unused refrigerator space
• Added thermal stability

Some homeowners keep multiple reusable water bottles inside for this reason.

Final Thoughts

Placing a bowl or container of water inside the refrigerator is a simple trick based on a real scientific principle: water helps stabilize temperature because it absorbs and retains heat effectively. While the energy savings may not be dramatic, the method can contribute to a more stable internal environment, particularly when the refrigerator is relatively empty.

For the greatest impact, combine this trick with other proven energy-saving habits such as minimizing door openings, maintaining clean coils, checking door seals, setting appropriate temperatures, and ensuring proper airflow. Together, these small changes can help improve refrigerator efficiency, reduce wear on the appliance, and potentially lower electricity costs over time.