Coconut water is the juice of coconut itself, which is transparent and sweet.
Coconut milk is a mixed product made of coconut meat and coconut water ~ milky white, sweet and rich in taste.
Coconut powder and more concentrated coconut milk are sold here in Hainan. They are convenient for long-term storage. You'd better ask the seller of cooling powder.
I hope it helps you ~
Hehe, because I like it myself, but it's a pity that I don't have it in Chinese mainland. It's really comfortable to drink one in summer ~:) Good luck.