DampRid FG01K Refillable Moisture Absorber, Fragrance Free, 10.5-Ounce by DampRid. Some people use DampRid to help control kegerator condensation.
8/19/18 10 PM Central: This is selling for just $2.97. Shipping to most US addresses is also free, with a qualifying order, as part of the Amazon’s Add On promotion. Prices, shipping and availability can change quickly. Please note that product prices and availability are subject to change. Prices and availability were accurate at the time this this post was published; however, they may differ from those you see when you visit Amazon. Check the product page for current price, description and availability. Also: Recent Amazon Finds and Amazon Fillers Resource Page
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More: Recent Amazon Finds