>>205877>metal water bottlesAluminium is also some kind of metal, right? But as you should know: It is unealthy to heat it up.
Well. Its not about metal. Its about stainless steel.
Negative aspect: It will heat up the whole bottle. The bottle will be hot for hours. A Isolated Stainless Steel Bottle could be the better choice. Also for bushcrafting/survival. I use 500 ml stainless steel mug for cooking. the mug has a foldable handle.