IBC Tote Cover Ibc Water Storage Tank Liner Bag for 275 Gallon 20C Thickness Clear Protective Liner Bags. Protect The Water Tank: Water storage barrel liner bags corrosion resistance, can effectively protect the inner wall of the water barrel from general liquid corrosion, so that the water storage barrel life longer, water vapor barrier can make your water storage barrel inside the water will not be reduced, to achieve a better water storage effect, with your water tank perfect match.