The piece here plays the role of an improvised thermometer. If when you return, the change remains on the surface or halfway up, it’s a good sign: your freezer has maintained a constant temperature. On the other hand, if the coin is at the bottom of the glass, it’s the alert: the ice has completely melted, which means that your frozen products have probably been completely thawed. In this case, it is best to avoid eating perishable foodstuffs, even if they still appear frozen.
A smart habit to get into right away

For more efficiency, position your glass in plain sight in the freezer. And if your device has several compartments, don’t hesitate to place a glass in each of them for optimal monitoring!
A solution trusted by users around the world
Since its appearance, this clever thing has conquered homes all over the planet. Thousands of testimonials confirm its effectiveness as an ultra-simple but extremely reliable method. Some have even adapted it to monitor their garage freezers or food supplies during long absences.
Why not try it today?
When it comes to food safety, every precaution counts. This little test might just mean the difference between a risk-free dinner and potential health problems. It only takes a few seconds to set up this system that will bring you peace of mind on a daily basis. So, grab a glass and a coin, and take the test without delay!