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Even better than a usual fridge, high humidity and a constant temperature of about 10°C keep the products fresh even longer. Vegetables, fruits and drinks may be cooled for weeks without the need of any kind of electrical power. The only thing you need is water to keep the system running. Just connect the water pipe to the cooler and enjoy this energy efficient method to refrigerate your food while reducing the availability of dangerous cooling liquid that when being disposed have a long-lasting negative impact on the environment.