Serious Technology - double wall stainless steel vacuum - triple insulated for extreme temperature retention! 24+ hours ice cold & 12+ hours piping hot. Serious Warranty - lifetime warranty! Yes you read that right - if your SIC product ever fails to live up to it's expectations we will gladly get you another one or refund your money (does not cover cosmetic scratches or chips in powder-coated finish). Integrated Carabiner lid for easy carrying! Keywords: Mugs, coffee, drinkware, tumbler, deep blue, solid color, blue, stocking stuffers