By November 8, 2010

How to Clean a Thermos King Stainless Steel Travel Mug

I wrote about my Thermos King stainless steel travel mug about almost five months ago. I still love the hefty, super high-performing, zombie-killing-in-a-pinch insulated coffee mug.

I have recommended several of these mugs and have purchased a few as gifts. One of my readers asked how to clean the lid, as the lid is a notorious sticking point for travel mugs. I decided to put together a video about it, as well as share some ownership / cleaning insights I’ve stumbled across.

  1. Clean the external part of the lid and the interior as often as you want. I use a nylon-fiber scrub brush you can buy for about a dollar. This is the part of the mug lid where you put your mouth. I also wipe it down every few days with a damp, clean cloth.
  2. Disassemble the lid and clean it on a regular, but not daily basis. I want to minimize wear and tear on the many plastic threads on my Thermos King. The lid has several plastic threads, and their gradual wearing down may lead to leakage. I disassemble the lid to my mug about once a week.
  3. Remove and clean the large main gasket sparingly. My King travel mug was leaking about a month ago. I thought that the seals had failed, and that my initial assessment of the mug’s durability was wrong. Turns out that a coffee ground had found its way into the gasket and kept it from sealing properly. A quick disassembly and rinse with tap water cleared everything up. However, I am concerned about deforming the gasket with repeated removal and reassembly.
  4. Hand wash everything. I’m paranoid about it I guess, but I’ve ruined a few cheaper travel mugs by putting them in the dishwasher. I think the heat starts to deform the plastic just enough to where it no longer keeps a seal.

Here’s a video I put together in case you want to see how it all works:

The King travel mug by Thermos is still kicking, despite the brand label coming off about two months ago. I love this thing, and I think you should give it a shot.

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4 Comments on "How to Clean a Thermos King Stainless Steel Travel Mug"

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  1. maiaoming says:

    oh my goodness, I’m sorry, but I am cracking up. you are so ernest. love it.

  2. Joyce says:

    I LOOOOVVVVEEE my thermos mug!! I agree, it’s the best one out there! I watched your video because I took it apart and I just wanted to make sure I was putting it back together right.


  3. Chris says:

    Thanks from France.
    My husband offered me my “King” and as a coffee addict, I love it.
    Just washed it yesterday but I didn’t have the assembly manual with me to put it back together.
    So thank you for this

  4. Michael says:

    I agree that this is a great coffee travel tumbler, but it’s impossible to get it 100% perfectly sanitary and clean, due to the lid closing mechanism. However you CAN get it clean enough, ONLY if you remove and gently clean ALL of the rubber seals, including the one that’s on the stem of the mechanism. For that you can pull it off using a tweezer, by slipping a tweezer end under the seal and then gripping it and gently pulling it off. Watch the orientation as there is a lip on one end of the seal that fits a shallow groove on the stem. To replace, slip the seal over the stem, lip-end first, and push it down until the lip slips into the groove. – Mike