As long as I have been dealing with Amazon I never heard of that gold box deal.
Well in my bedroom the humidity is always around 45% or lower here in NJ.
I used to do refrigeration work so I repaired a trashed dehumidifier and that takes care of the humid air we get here in the summer.
But I went for those packs just to see how they work.
I have been using water in a small container then putting the rubber sound hole cap on then check it 2 days later.
It does the job but the changes in water level are insignificant.
Thanks for responding
BOB LECH AF2Q
Former member of the 12:00 Oclock Skydiving Team