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Title: 3 Types of Water That Should Never Be Stored in a Thermos
Thermoses are incredibly convenient for keeping drinks hot or cold on the go. Whether it’s your morning coffee, an afternoon tea, or water to keep you hydrated, they help maintain the temperature and save you from having to reach for a cup or bottle constantly. However, not all liquids are suited for long-term storage in a thermos, and some types of water can actually be harmful or cause issues when stored in these containers.
In this article, we’ll go over three types of water that shouldn’t be stored in a thermos and explain why it’s important to avoid putting them in there.
1. Hot Water with Certain Additives
Why Not? You might think that any hot liquid, including water with a bit of lemon or honey, can be stored in a thermos. However, when you add things like lemon, honey, or other substances, you’re introducing organic compounds that can alter over time. The acidic nature of lemon juice, for example, can react with the metal of a thermos, potentially causing a metallic taste and even damaging the lining of the container. Additionally, these additives can start to spoil if stored for long periods, especially when combined with heat.
What Happens?
- Change in taste: The combination of acid and heat can cause the water to taste strange, even within a few hours.
- Possible bacterial growth: When honey or citrus juice is left in a hot environment, the sugars can ferment, leading to bacterial growth or spoilage.
- Damage to thermos lining: Acids and sugars can wear away the thermos’ lining over time, reducing its ability to keep drinks insulated effectively.
Tip: If you’re using your thermos for hot beverages with additives, like hot lemon water or tea, consume it within a few hours, and make sure you clean the thermos immediately after use to avoid any damage.
2. Water Containing Milk or Dairy Products
Why Not? Water that contains milk or dairy products is a no-go in a thermos, especially if you plan to store it for any length of time. Milk and other dairy products can spoil quickly, and a thermos, though good for insulation, does not prevent the growth of harmful bacteria.
What Happens?
- Spoiling: When milk is kept at a warm temperature, it begins to sour. The bacteria in the thermos will multiply, turning the milk into a breeding ground for harmful microorganisms.
- Odor and taste issues: Even a few hours can be enough to cause milk to develop an unpleasant taste and smell.
