One of the women on BushCraftUSA shared this nifty little "Staying Alive Cold Kit" set-up this winter, using a mylar blanket, some duct tape and a candle:

https://www.youtube.com/watch?v=vXurGm_7cWc
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Mom & Adventurer

You can find me on YouTube here:
https://www.youtube.com/channel/UCT9fpZEy5XSWkYy7sgz-mSA