Trekking Blog for ultralight and outdoor – Trailblaze

MYOG ultralight thermos bottle

March 14, 2009 by · 4 Comments 

I have done without a thermos bottle on a number of winter trips because they were always too heavy for me. I only enjoyed hot tea when camp had been set up for the night. At last, however, I have found an appropriate solution which keeps my tea hot for a long period during the day.

I created my own thermos bottle using the following component parts:
– Integral Designs – Primaloft Insulated Bottle Cover 40 grams
– Nalgene Cantene Water Bottle (1L, wide mouth) 60 grams
– Rescue blanket 3 grams

MYOG Thermosflasche Ultraleicht

Although the Integral Designs Bottle Cover has been designed for Nalgene 1 Liter polycarbonate bottles (hard plastic), I find these to be much too heavy. I have also tried out a Platypus 1 Liter, but this did unfortunately does not fit properly into the ID Bottle Cover. For this reason, I use the Nalgene Cantene Water Bottle. This features a large opening, making it very suitable for use with a tea bag.

I have unfortunately not been able to discover an outlet in Germany for the Cantene Water Bottle. The precise volume of the Nalgene Cantene Water Bottle is, incidentally, 1.25 liters.

The thermos bottle weighs a total of 103 grams and will be my constant companion on future winter trips.

MYOG ultralight thermos bottle

Available from:
– Integral Designs – Primaloft Insulated Bottle Cover (available from
– Nalgene Cantene Water Bottle (1L, wide mouth) (I obtained this via It is also available from
– Rescue blanket (available from, for example)


4 Responses to “MYOG ultralight thermos bottle”
  1. Kathleen says:

    I’m very interested in this set-up, because I, too, don’t like carrying a heavy thermos in the winter. I’m not quite sure what you do with the rescue blanket. Is this one of those mylar survival blankets that you’ve cut and somehow sealed along the edges to fit over the nalgene cantene before putting it into the primaloft bottle cover? Could you explain that a little more? Thank you!

  2. j says:

    Brilliant! I love the multipurposeness. 🙂
    I don’t do many winter trips, but I love my hot drinks, so I’ll probably be trying this.
    All I need is that bottle bag thing. Hmm, I wonder what it’s made of…

  3. Greg says:

    I’ve made something different:
    – Laken aluminium bottle 0,7l wide mouth
    – rescue blanket
    – bubble foil
    – 0,5cm thick wool sock
    – sill nylon sack
    Total 204g

    Its work very poor in 0C :-/ This setup is far worsen then any cheapest vacuum thermos.

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Trekking Blog for ultralight and outdoor – Trailblaze