1. packaging: the real coconut water packaging should have a complete logo and trademark, with obvious information such as batch number, production date and shelf life, clear handwriting and no ambiguity.

2. Smell: After opening the bottle cap, if there is a strong coconut smell, it smells very fresh and natural, and it is probably real coconut water.

3. Taste: The real coconut water should be a little sweet, sometimes accompanied by a little salty taste, but it won't have too much sweetness and unnatural taste.

4. Transparency: The real coconut water will produce some deposits at the top during the preservation process (also known as "coconut eyes"), and the transparency of coconut water should be high.

5. Price: The price varies according to the brand, specification and place of origin, but if the price is very low, it may be a fake. It is recommended to choose a regular and reputable merchant as far as possible.

I hope the above information can help you solve the problem. Please feel free to let me know if you have any other questions.