• Safe, BPA-free materials: food-grade silicone hose, 304 stainless steel pipe, and high-density ABS plastic. • Portable design suitable for office, home, school, or outdoor use. • Fits standard 2.16-inch (5.5cm) neck gallon barrels. Verify your barrel size before purchase. • Rechargeable 1200mAh battery lasts 30-40 days or dispenses 4-6 bottles of 5-gallon water per charge (3 hours). • Easy to use: simply insert the hose and snap the pump onto the bottle. • Compatible with standard Tanzanian bottled water sizes. • From Smartware Collection.