Stay hydrated before you explore the Upside down with this officially licensed Stranger Things Polyresin Mug. The inside of this mug is stainless steel and holds 350ml of your favourite drink. The outside has been all cast in high quality resin and shows Mike and Eleven in our world and the Demogorgon stalking them from below. The handle has been cast to resemble the twisted trees that exist in the dark Upside down. Great for any Stranger Things fan. So what are you waiting for? You're no mouth breather.