In recent times, an unusual trick has spread through social networks: put a coin inside the freezer before leaving home for a few days. At first glance it may seem like an absurd idea, but it has attracted attention because it is simple and effective.
Prolonged absences and safety foods
In a context where many Portuguese are absent during the holidays or prolonged weekends, the concern with the conservation of food becomes relevant. The freezer, a central element in many kitchens, is essential to maintain the quality and safety of most stored products.
Bacons: a silent risk
During periods of absence, it is possible that a failure of energy occurs. If electricity will return before the residents’ return, it is very likely that no one realizes. However, it is enough for a few hours without chain for the freezer to lose temperature, allowing the defrosting of food.
If the products freeze when the energy returns, it is difficult to realize that something has happened. In the case of meat or fish, this reconnament can pose a health risk, even if in sight it seems to be in good condition.
How the currency trick works
The technique is simple: just fill a glass with water and place it in the freezer until the water freezes completely. After that, a coin is lands on the ice and leaves there until the return.
When you return home, the position of the coin indicates if there was temperature change. If it is at the bottom of the glass, it means that the ice has melted completely at some point. If it is in half, there was a partial defrosting. If it is at the top, there was no interruption in operation.
This small gesture allows a quick and clear visual assessment of the state of the freezer. It does not replace common sense or direct observation of food, but it can help to avoid consumption of products that have been in poor condition.
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A measure without cost and accessible to all
Anyone, according to, can use this technique. It requires no tools or specific appliances. A common coin and a glass of water are enough. It works with any metal currency as long as it has enough weight to move if the ice melts.
Ideally, a transparent glass should be used to facilitate observation, but this is not mandatory. The important thing is that the currency will be visible and that the container be stable inside the freezer.
Avoid risks in the home return
When returning on vacation, it is usual not to check carefully the state of frozen foods. The presence of the currency outside the top of the ice can be a useful alert.
This simple method does not interfere with the functioning of the freezer, nor does it occupy relevant space. It can be left in the corner of a shelf without any inconvenience.
With increasing sharing of this trick, many start to include it in their routines before leaving home for long periods. A discrete gesture that can help ensure greater food safety in the return.
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