The Boveda Humidipacks work extremely well. I have the larger sizes for a couple of humidors but these ones are great for travelling and I even manage to squeeze one into my two stick case when I'm out and about. They really do keep the humidity at a constant level.
These are great, strategically place them throughout my humidor to make sure every nook and cranny is a perfect 69% humidity, they also remove humidity so are great at stopping mould in all those hard to reach places
