Every Contigo product is engineered with your on-the-go lifestyle in mind. You commute a long way to work via bus or train, have active households, and like your morning coffee piping hot and your post-workout water icy cold. All bottles are BPA free Plastic or Stainless Steel and feature patented Autoseal and AutoSpout technology for one handed operation, and are 100% leak proof. Easy one handed drinking, spout cover to protect against dirt and germs and it automatically seals between sips.