Ah, there's a question I'm going to sneak away from. I shouldn't have hinted, sorry for being a tease, but it's just not ready for show-and-tell yet :)

Fair enough.

For the interim what do you and Mellow recommend customers use for a "temperature-safe bag" (per instructions on your website)?

On food-safe bags; we can't make a better recommendation than what the manufacturers make themselves. Personally, I've used ziploc when I've been able to afford it.