A few things about #Nalgene bottles for #backpacking #camping #trekking #outdoors:
The polycarbonate 1 L bottle weighs 176 g. The HDPE version is cheaper and weighs 110 g.
HDPE will be leakproof up to 150°F as a hot water bottle to heat your bedding at night. 100% boiling water will burn you and cause leaks.
Mix 500 mL 100°C (boiling) water with 500 mL 20°C water to get 1000 mL of 60°C water (140°F). Adjust for ambient temp.
I've done this every night for a whole Winter, zero leaks.





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