Cleaning stainless steel thermos cups can be a tough task, especially when they have an inner wall with shallow stripes. Additionally, the narrow mouth of the cup makes it difficult to reach inside for thorough cleaning. As a result, stubborn stains from beverages like tea or coffee are a common sight in such cups. However, fret not, as we have some easy-to-follow tips to help you clean your thermos cup with ease.

To effectively remove sediment stains from a stainless steel cup, start by tackling those stubborn coffee and tea deposits. These stains can be quite challenging to clean with just a simple brush, as their stickiness makes them resistant to regular scrubbing. However, there is a clever solution to this problem. Begin by filling halfway of the stainless steel cup with white vinegar, and then add half a cup of water. White vinegar possesses a softening effect that works wonders on tough scales and deposits. By pouring this mixture into the cup and allowing it to soak overnight, you'll find that the sediments are effectively softened. The next day, simply pour out the vinegar-water solution and give the cup a quick rinse. Although the smell of vinegar may be rather strong initially, airing out the clean stainless steel cup for a while will ensure the scent dissipates.

Furthermore, it's imperative to eliminate any unpleasant smells coming from your thermos. Since most thermos cups are airtight, it's natural for them to develop a distinct odor if they aren't cleaned daily. If you discover that the water inside your thermos smells off, it's best not to drink it. To avoid this, make it a habit to open your thermos regularly and wash it thoroughly to prevent any pungent smells from developing.

The cup's peculiar smell, in fact, stems partly from its deterioration. To eliminate this odor, it's essential to meticulously brush the cup using a cup brush, including the lid portion. After thorough scrubbing and drying, the smell will disappear. If the taste persists, an easy remedy is to crush a few tea leaves and place them in the cup overnight. Then, simply pour out the infused leaves, and voila! This method is incredibly convenient for refreshing the cup.

Third: Disinfection is essential when it comes to maintaining cleanliness and hygiene, especially for items that come into contact with food and drinks for prolonged periods. This holds true not only for baby feeding bottles but also for thermos cups used by adults. These cups act as tableware and are susceptible to harbouring germs and bacteria. It becomes even more critical to disinfect these personal items after being unwell. Fortunately, if you have a dishwasher equipped with ultraviolet light sterilization, you can easily ensure that your thermos cups are thoroughly sterilized with utmost convenience. Simply place them in the dishwasher, and let the ultraviolet light work its magic, rendering your cups free from any harmful microorganisms.

In case you are without a dishwasher, don't fret! You can still achieve a clean thermos cup by boiling it in a pot. However, it is important to note that your thermos cup should be able to withstand high temperatures to avoid melting its outer shell. Thus, when buying a thermos cup, it is wise to choose the type with a full body metal insulation to ensure durability.