The 2 quart battery filler is the ideal product for the servicing of batteries, whether you need to refill water in a flooded battery or add battery acid, this filler can support both your needs. The filler is made from tough polyethylene material that is resistant to battery acid, and other automotive fluids, that are required in the servicing of batteries. This product has an automatic shut off spout that will stop the flow of fluid once the battery has reached the proper level, meaning you never have to risk overfilling or accidental spills.