With all respect:

I have several Storm whistles, including a couple of different models. They are bloody excellent. I have given several more as gifts. They are part of my front-line kits.

But I find no evidence of a pea. Rattle one around: hear a pea? I don't.

That said, I have had many pea-equipped whistles. I have never had one freeze in cold weather. And if it did freeze, the solution would be to hold it in your glove (or shove it into your shorts) for a minute, alongside your Bic, shake it around, and it would work like it should.

So, respectfully, I don't see what the fuss is about.