FULLY STAINLESS STEEL INTERIOR - The water does not touch any plastics or any other synthetic materials.COOL TO THE TOUCH EXTERIOR - The double wall keeps the water warm for longer while staying cool to the touch on the outside.KEEP WARM FUNCTION - Press the button to keep the water at a steady temperature of 167 F (within 5 F accuracy). The keep warm function stays on until you turn it off.STRIX CONTROLLER - State of the art British STRIX controller works better and lasts longer. Quick boil 1500 Watt base brings your water to a full boil in a matter of minutes.PEACE OF MIND - With our 1 year warranty. As long as they were purchased new on Amazon, we will replace it free of charge. Warranty only valid for defects in materials or craftsmanship, any damages caused by misuse will void the warranty.