AquaTru Carafe is a compact water filtration system with a durable, easy-to-remove glass water carafe that fits in the refrigerator. This complete system filters through a 4-stage filtration, via Ultra Reverse Osmosis®, more than 99% of all contaminants from your tap water. AquaTru Carafe is easy to use: 'Plug & Play'. In other words: put the plug in the socket, fill the water tank with tap water and within a few minutes your water is purified into fresh and pure drinking water.