Your body is made up of nearly two-thirds water, so it makes sense to drink enough every day to stay hydrated and healthy.
Water, tea, coffee, milk, fruit juices and smoothies all count.
We also get fluid from the food we eat, especially from fruit and veg.
Does it matter what we drink? Yes, particularly when it comes to fruit juices and sugary drinks – you can be having more calories and sugar than you mean to because you’re drinking them and not noticing.