A drink with the word “fruit” does not mean it has fruits inside or is a healthier option than carbonated drinks. Check out the ingredient list and you may find the only “fruit” in a fruit drink is the fruit flavour. The other ingredients are just water, sugar, honey, syrup, or other forms of added sugar.
Some fruit drinks are very high in sugar as well. Check out the nutrition label and you may find the sugars content in some fruit drinks similar to that in some carbonated drinks, i.e. about 10 grams sugars in each 100 millitres. If dietary fibre, vitamins and minerals from fruits are your concern, choose whole fruits rather than fruit juices.