Regular and thorough cleaning of your thermal mug is essential if you want it to last and remain hygienic. Coffee or tea residues can not only cause deposits and unpleasant odors, but also affect the taste of subsequent drinks. It is best to wash the mug immediately after use – even if it is just with hot water. The lid, spout, and other removable parts should be taken apart and washed separately. Many models allow the lid to be washed in the dishwasher, but the body, especially if it is powder coated, is better washed by hand to avoid damaging the coating.
Although it may seem better to fill the cup to the brim, overfilling is a common mistake that can result in a wet bag, burns, or a lid that does not close properly. Always leave a little space – this allows for a secure closure and reduces the risk of the contents being ejected due to pressure build-up, especially with very hot liquids. It is also a good idea to wait a moment after pouring boiling water before closing the cup – this will allow the temperature to equalize and minimize the risk of excessive pressure inside.
It seems obvious, but many people forget to check carefully that the cap is screwed on properly. Tightness is one of the most important features of a thermal mug – and its lack is often the result of careless closing. It's a good idea to simply shake the cup before putting it in your backpack or bag – if nothing leaks, you can set off without stress. It's a small habit that will save you from many a morning disappointment.