Cranberry juice is a tart and refreshing beverage made from the juice of cranberries, a type of fruit that grows on low-lying shrubs in wetlands. The juice is known for its distinctive tartness, which comes from the natural acidity of the cranberries. It is often sweetened with sugar or other sweeteners to balance the tartness, and may also be blended with other fruit juices or flavors.

Cranberry juice is commonly consumed as a healthy beverage due to its high levels of antioxidants and potential health benefits for the urinary tract. It is available in both natural and processed forms, and can be found in most grocery stores and supermarkets.