That is exactly why I only use a Lite Beer 'Stay Cool' long neck plastic bottle. Or should that be Lite "Beer" Stay Cool bottle?
I chose it for safety and practical reasons: It's double walled. The cap holds exactly 2 tablespoons which seems to be an important measure for some stove folk. It holds a little more than a HEET bottle, so you can pour in a new HEET at resupply without dumping out the couple ounces left from the last filling.
And no hiker would ever, ever drink Lite Beer.
See? Completely safe.
OK, so the downside is that you have to buy a six-pack of LITE beer to get one bottle. But LITE beer works well as slug bait in your vegetable garden and I've heard there may be other uses.