>>2051241
Nah.
If the sun having a big day out, nothing is gonna keep that water cold for more than an hour. Unless you're ready to carry more metal than liquid in the bottle.
It's better to just embrace the suck and get used to piss warm gatorade.

>>2051248
Inline barrel adjuster
https://www.youtube.com/watch?v=2zUhwdXj7wc