Somewhat related, or so I hope... (extremely dumbed down, apologies if you understand the subject matter).
In the vaccine manufacture business, chicken eggs are often used to "grow up" vaccine. The eggs need humidity, from the air, to keep the "inners" hydrated, and produce the maximum amount of "inners" with "vaccine stuff" in it. Currently, the majority of incubators out there have "pans o' water" in the bottom, which is supposed to evaporate to the incubator and in turn increase the humidity round the eggs. The problem is, the "pans" need refilling with water, and need to be changed/ cleaned periodically to prevent "nasty ju-ju" from growing in the pans' water. As such, every incubator needs "water in/ water out" ports - not feasible in sterile cleanrooms and such. <Whew! enough science (edit: stuff) for now>
Cool (and related) thing: Our PI (principal investigator -- the 'big guy manager') decided that we could use an incubator without the "pan o' water" but with *saturated* KL, instead. No need to worry about sterility so long as the "typical" autoclaved water be used. Every week, add about 100mL more sterile water, keeping it *soaked*, and the rel humidity is >90% in there.
I'm curious if heartfelt beads has thought of that corner of the market, or even if they have a way of having 95%rh beads... even if not thought of, I found it pretty interesting, at very least, that autoclaved KL has its use in maintaining humidity in the sciences... So there you have it, folks: Kitty Litter saves lives via vaccines! Well, sorta...
Just my 2 cents, and hope you find this remotely interesting,
ZugbugPete