I think avoiding BPA in things you use every day is okay. Good but not essential. But for containers that will only see use in an emergency and short term I'm not willing to make any great investment in changing things out.

It isn't like the alternatives don't often have issues. A few years back some spun aluminum cookware and bottles were found to have high levels of lead. Lead paste is used as a lubricant on the aluminum because it makes manufacturing easier.

I also suspect that new plastic with BPA leaches most of its BPA out in the first few uses and when used with hot liquids and materials are stored in it. Anyone who has used a new bottle and tasted the 'new plastic twang' knows what I'm talking about. I suspect that if you boil up some soapy water in the microwave and scrub it well, repeating it a few times, you might significantly reduce the amounts of BPA leached out. I do that anyway to avoid the new plastic taste.

Then again most of my plastic containers are polyurethane not Lexan but in time, as the various pieces of emergency gear break or need replacement, I will naturally lean toward BPA-free plastics.