Nice!
And if I can make a recommendation to anyone who is wondering as to how to keep warm: I suggest a pocket warmer that runs off lighter fuel, such as by Zippo and Whitby. EBay is a good source of them; they have replaceable burners that last and the fuel is cheap. A few times I've had a warmer run for fifteen hours or more even though the maximum quoted time is 12.
The only two downsides are that they can smell like a cigarette lighter and because they use combustion they output water as a byproduct.
If interested, just search for Zippo / Whitby hand or pocket warmers on there.
The replacement burners are interchangeable so no worries about compatibility π
No, I'm not a seller or dealer; just making a recommendation and suggestion, because I don't believe in ones that are electrically powered and rechargeable as they're probably worse than those that use lighter fluid for the environment and economics. I work outdoors, so I use these things regularly when it gets cold.