An analog hygrometer with magnetic back
A tray with divider
A divider for the bottom area
Super absorbent polymers are crystal-like substances that can absorb lots of water, sometimes as much as 300 times its weight. Over the course of a few minutes, the polymers absorb water and turn into a sloshy gel-like consistency that is mostly just water. Once they’ve absorbed the moisture, the polymers will release the water and eventually, if left in a dry environment, will transform back into the dry crystal-like state.
This is an alternative to the florists’ foam humidifiers, though the idea is pretty similar. Super absorbent polymers will release the humidity at very high rates I use them to season humidors sometimes as opposed to just leaving open bowls of water and while it’s a bit more of a high-tech solution than florists’ foam, the humidity still needs to be regulated.