hot water in a hydration bladder?

I know Platypus can take water from freezing all the way to boiling. Just don't get it near an open flame. :)

I've put right off the boil water in my Camelbaks without issue. The bite valve though was a quick connect Platy valve I think.

I routinely pour boiling water straight from the pot into my Platy…the bladder will get a little supple but I haven't had any problem yet.
One thing…after you put the scorching water in, careful when you pick it up…the thin plastic doesn't insulate at all. Ever play hot potato?

If and when you DO use hot water in your hydraton bladder remember the high heat will release more plasticizers into the water than months of normal temp range water will do.

So I'd find a way to warm the bladder externally without getting it hot, such as using chemical hand warmers.

Eric