4 lb tub of DampRid Moisture Absorber by DampRid.  Some people use DampRid to help control kegerator condensation.

Update: Since this post was published the price, availability or promotion has changed.  Check the product page for up to the minute description, price and availability.  Also: Today’s Deals on Amazon

DampRid FG50T Hi-Capacity Moisture Absorber, 4-Pound Tub

Also Consider:  The Eva-dry E-500 Renewable Wireless Mini Dehumidifer.  I’ve used this for years in my kegerator and it works very well at keeping condensation in check… Hands on Review

Also: Kegerator Tips & Gear | Keg Repair Part #s | 5 Recent Keg Finds

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