Eva-Dry E-150 Disposable Moisture Absorber Pouch – 13-1449

The Eva-Dry E-150 is a small throw-away pouch that pulls moisture out of the air in a closed space like a cabinet, storage bin, closet, or your RV while it's parked for the season. Inside is a mix of silica gel and activated charcoal, so it soaks up dampness and helps with musty smells at the same time.

There's nothing to plug in and no batteries. You just set the pouch where you want drier air, and it keeps working for about 60 days before it's used up. At that point you throw it out and open a new one. It's a good, cheap option for a small space where running a powered dehumidifier isn't practical.