I keep mine in the refrigerator while in transit, as well. Just blow the water out of it, replace the caps, and lay it on one of the wire shelves so it doesn't roll around. Before I went "full-time", I'd keep it in the home refr. I don't know if it retards bacteria growth, but figure it doesn't take up much room, and it can't hurt.
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2013 Eagle 266RKS
2011 Ford F-150 w/3.5L Ecoboost & H.D. Tow Package
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