Thermo 3D® double wall vacuum insulation – keeps hot stuff hot and cold stuff cold 18/8 stainless steel – enduring material meets beautiful design Threaded lid – for leak free performance (and peace of mind) Cup holder compatible (16 & 20oz) Ice cube compatible Does not sweat – let’s save that for the gym BPA free – no Bad Plastic Awfulness (or Bisphenol A) here Hardshell™ powder coat finish – safe, durable and classy