Other dudes have hit the safety aspect, but heating up or boiling hot water to put in a Nalgene at night can make a cold night significantly more palatable. It may even allow you to bring a lighter bag or ditch the puffy pants saving more weight than it cost as mentioned like @wapitispokes said...
Quick down and dirty or BLUF:
If you have the coin buy them as their value is absolutely there and peace of mind is priceless.
Lengthy and overly verbose review:
I contacted Stephen back in July 2021 to get a consult and ask a ton of questions. I had been talking with a military buddy...
Hey looking to sell some 300 brass. Prices are shipped lower 48. For the 220gr Hybrid Bergers I would gladly trade for 215 Hybrids. PM with questions.
50rds new/sealed ADG brass 85$
50rds once fired ADG 50$
220rds Hornady once fired 80$
250ct Berger 220gr LR Hybrid Target 150$
-Jordan