I have the beads, in a small tupperware bowl, in my coolers, and a couple of shotglasses full in my Desktop Humi. I have never had this stable a humidity level. Dead On 65%. In my traveldor, I put them in a bolivar#3 tube, with holes drilled through it. Works like a champ. Forget the glass, aluminum tubes work great, without the danger of broken glass tubes.
Later
Dave (A.K.A. Homebrew)