The Cup 450 is lighter than most metals! The material is made of pure titanium, an inert metal, and it will not leach into your drink. No change to your coffee’s flavor or body. With no paint or coating this cup won’t chip, fade or crack like ceramic or heavy plastic travel mugs. It’s incredibly durable and rustproof. Utensil friendly including sporks, chopsticks and knives. You can even throw it in your dishwasher!