aren't you guys concern about toxic plastic compound exist in water bottle?
No. I figure if I'm drinking the 100+ liters of water each day for a year I'd need to get the dangerous concentrations bisphenol A then I have bigger problems.
-Blast
Don't forget the most important fact. There's no proof that BPA is harmful in the first place. Even for the people who work with pure BPA in powder form in manufacturing plants like where Nalgene type bottles are made, there have been no recorded effects due to exposure. Even in infants using baby bottles made with BPA, there's no proof that the BPA does them any harm...studies are ongoing so until they come back with conclusive proof that we're all going to turn into mutant freaks because BPA is similar to human hormones, I'll keep my bottles where they are.
For what it's worth, I'm trying to learn to live without my gadgets. I still like them...but I don't want to be reliant on them where skill would be sufficient. I'm re-reading Northern Bushcraft by Mors Kochanski. I've forgotten how much you can do with a knife, axe, and a pot...if you have the skills to back it up.