A fruit juice machine works by first crushing and pulping fruits to extract their juice. The juice is then filtered to remove any pulp or seeds, resulting in a smooth and delicious juice that is ready to drink. 

The product advantage of a fruit juice machine lies in its efficiency and convenience. With just a push of a button, the machine can produce fresh and nutritious juice in a matter of minutes. It also allows for customization, as users can choose their preferred fruits and mixtures to create their own unique juice blends. 

In addition, fruit juice machines are easy to clean and maintain, making them a great addition to any kitchen or commercial setting. Overall, fruit juice machines offer a quick and effortless way to enjoy the refreshing taste of freshly squeezed juice, promoting a healthy lifestyle and providing a burst of energy to start the day.