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Vacuum flasks, also known as thermos flasks, are indispensable tools for keeping beverages hot or cold for extended periods. These ingenious containers utilize a vacuum-insulated chamber to minimize heat transfer, preserving the temperature of the contents. Their uses are multifaceted and versatile. They are ideal for keeping coffee, tea, or soup piping hot during outdoor activities like camping, hiking, or picnicking. For those on the go, vacuum flasks maintain the chill of refreshing drinks on hot summer days, making them ... more