HID SIPS offers the world's first, and only, stand-alone water storage and refrigeration system with integrated water dispensing technology. It has many high tech features features including:One-Touch Automatic Push to Dispense System8 Levels of Quantitative Pumping with 8-Stage Capacity SelectionLong Lasting Lithium Ion BatteryFood Grade Water LineQuiet Dispensing TechnologyHigh Quality Plastic and Aluminum Parts . HID SIPS mini fridge and hard water reservoir are a perfect step-up from any other way you keep your water cold. Some of the features that make it the perfect companion are:4L SizeCools Water to 40 Degrees Below Room TemperatureQuiet Design is Less Than 28 dBThermo-Electric Design is Energy EfficientDishwasher-Safe Hard ReservoirQuick-Connect-Disconnect Buttons For Easy RefillFits Under Most Beds and Desks