Why do I crave fruit juice everyday?

I am Korean currently living in Brisbane for a while.
I do not know if I do because it is so hot during this summer season but I crave fruit juice everyday.
Boost juice (this is not an ad) is popular all over Australia
And each original sized cup costs 6–7 dollars
But I crave them so much (either that or some coles fruit juices)
I end up buying it once every two days.
Is this related to my health condition?

I heard when you crave something, it usually tells you something about your health. And after taking enough of it, the craving tends to cease. Only, in my case, it doesn’t stop!!!

- by the way, I do not crave real fruits somehow. Weird.