A Risk of Water Flasks

As summer approaches, we will need to receive hydration frequently.

At such a time, a water flask is useful because of its portability.

I think some people put isotonic drink or juice in the water flask.

Such drink containing salt and sugar is effective to heat stroke, but if the water flask is made of metal like aluminium or stainless, please be careful.

Most of these metals are easy to react with acidic liquid such as isotonic drink, juice, carbonated beverages.

In particular, coke have really high acidity, and it easy to melt metals.

If we drank these beverages containing melted metals, we will be poisoning.

Therefore, please do not put beverages except water in your water flask.

• I think some people put isotonic drink or juice in the water flask.
• I think some people carry isotonic drink or juice in their water flask.

• Such drink containing salt and sugar is effective to heat stroke, but if the water flask is made of metal like aluminium or stainless, please be careful.
• Such a drink containing salt and sugar is effective to heat stroke, but if the water flask is made of metal like aluminium or stainless, please be careful.

• Most of these metals are easy to react with acidic liquid such as isotonic drink, juice, carbonated beverages.
• Most of these metals are easy to react/easily react with acidic liquid such as isotonic drink, juice, carbonated beverages.

• In particular, coke have really high acidity, and it easy to melt metals.
• In particular, coke has really high acidity, which can melt metals easily.

• If we drank these beverages containing melted metals, we will be poisoning.
• If we drink these beverages containing melted metals, we will be poisoned.

• A Risk of Water Flasks
• This sentence is perfect! No correction needed!

• As summer approaches, we will need to receive hydration frequently.
• As summer approaches, it's important to stay (adequately) hydrated.

  Not wrong, but here's another way to put it :)

• At such a time, a water flask is useful because of its portability.
• In times like these, a water flask is useful because of its portability.

• I think some people put isotonic drink or juice in the water flask.
• I think there are people who would substitute water with an isotonic drink or juice in the water flask.

• Such drink containing salt and sugar is effective to heat stroke, but if the water flask is made of metal like aluminium or stainless, please be careful.
• Even though such drinks contain salt and sugar which are effective against heat stroke, you have to be mindful/careful not to store them in water flasks made of metal-like aluminium or stainless.

• Most of these metals are easy to react with acidic liquid such as isotonic drink, juice, carbonated beverages.
• Most of these metals react easily with acidic liquid such as isotonic drink, juice, and carbonated beverages.

• Therefore, please do not put beverages except water in your water flask.
• This sentence is perfect! No correction needed!

Good to know! Though I can understand why some people do this since water is well... not that tasty. haha!