The 55-gallon water barrel is a durable container designed for water storage. The barrel is a closed water storage system with two fittings: 1 - 2" BTR and 1 - 2" NPS. The siphon pump is easy to use. It safely pumps water, fuels, paints and solvents. The Aquamira liquid water treatment drops are ideal for large water treatment (up to 60 gallons), but packaged small enough to fit into your pocket. The four-year shelf life is not affected by partial use of a bottle. It's effective on bacteria, viruses and cysts. No unpleasant aftertaste and meets stringent EPA guidelines. The bucket lid opener allows quick and easy opening of barrels, pails and buckets without lid damage. Does not contain BPA (bisphenol A).