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1. Milk
Some individuals often have the habit of pouring hot milk directly into thermos flasks to keep it warm and sip gradually. However, this practice is detrimental to health.
Avoid storing milk in thermos flasks.
The reason is that storing milk in flasks creates conditions conducive to rapid microbial growth, potentially spoiling the milk. Drinking milk from a thermos flask immediately after pouring can lead to diarrhea and stomachaches.
Additionally, the high temperature of the milk can also lead to the destruction of essential nutrients. Moreover, the acidic compounds in milk can chemically react with the flask's inner lining, posing health risks.
Therefore, it's imperative not to put milk into thermos flasks or any other non-sterilized containers.
2. Acidic Foods and Beverages
You should absolutely avoid placing highly acidic beverages such as orange juice, lemonade, grapefruit juice, mango juice, tamarind, etc., or acidic foods such as pickles, sour soups, etc., into thermos flasks. The acids in these foods and beverages can rapidly and strongly corrode any residual heavy metals in the flask's core.
Avoid putting highly acidic liquids like orange juice, lemon into thermos flasks.
Especially, if the flask core is not made of good quality stainless steel, it is highly susceptible to contamination by harmful substances such as arsenic, copper, lead, and mercury.
When using low-quality flasks, the acidic components in food can stimulate the release of heavy metals in stainless steel and may affect the health of consumers.
Therefore, fruit juice should be stored in plastic or glass containers.
3. Tea
Tea contains many nutrients such as tannins and theophylline. Using a thermos flask to brew tea will destroy these nutrients if the tea is kept at a high and constant temperature for a long time.
Avoid putting tea in thermos flasks.
Furthermore, if tea is kept in a thermos flask for a long time, it will release harmful metallic substances.
4. Herbal Medicine
For convenience, many people often pour herbal medicine directly into thermos flasks after soaking. However, this is a mistake, and you should absolutely avoid doing so.
Herbal medicine extracts contain a large amount of soluble acidic substances. Therefore, putting herbal medicine in thermos flasks can result in unfavorable chemical reactions for the body.
Avoid putting herbal medicine in thermos flasks.
Above are the types of liquids that should absolutely not be put into thermos flasks. We hope the information in this article will help you use thermos flasks correctly to ensure health safety.
