Thermoses are incredibly useful for maintaining the temperature of our favorite drinks, keeping coffee piping hot or water refreshingly cold throughout the day. Sturdy and convenient, they’ve become a staple for people on the go. However, not everything belongs in a thermos.
Certain drinks and foods can damage the thermos, alter the taste of future contents, or even pose health risks. Below, we’ll explore three items you should avoid putting in your thermos, along with tips to keep it in great condition for years to come.
Three Things You Should Never Store in a Thermos
1. Milk and Dairy-Based Beverages
Though it might seem convenient to bring hot milk or a creamy coffee on the road, it’s not a good idea. Dairy products are highly perishable and can quickly become a breeding ground for bacteria when kept warm over time.
This can lead to sour odors, unsafe conditions, and a difficult-to-clean interior if residue sticks to the walls.
Tip: If you must bring milk, store it for a limited time and wash your thermos thoroughly right after use.
2. Citrus Juices and Acidic Beverages (like lemon or orange juice)
Drinks with high acidity, such as citrus juices, can react with the metal inside the thermos.
This not only affects the taste but can also erode the interior lining, reducing the thermos’s lifespan and potentially releasing harmful metals into your drink.
Tip: Use glass or BPA-free plastic containers for acidic juices and consume them shortly after packing.
see continuation on next page
