A lifestyle report from ELLE Taiwan published on October 18, 2026 points out that many people simply rinse their thermos with water before refilling it, which over time can leave behind oils and particles from drinks—making it worth revisiting everyday cleaning habits.
According to the report, thermoses should be washed daily using warm water and a neutral detergent, scrubbing the interior walls and base with a sponge or soft brush. Parts that tend to collect residue, such as the lid and silicone ring, should be removed and cleaned separately. After washing, all detergent should be rinsed off thoroughly, and the thermos should be left upside down in a well-ventilated area to dry completely, as damp conditions can affect hygiene. The silicone ring should also be replaced periodically depending on usage.
From an everyday perspective, caring for a thermos isn't so different from washing regular tableware—the key is building the habit of taking it apart, rinsing thoroughly, and letting it dry fully, rather than relying on a single trick for instant results. For specific deep-cleaning methods, frequency, and part-replacement schedules, it's best to follow each brand's official instructions to balance the thermos's lifespan with everyday safety.
