Here is something new from Nalgene. A Wide-Mouth bottle made from their BPA free Everyday material that glows in the dark. Expose it to the light for a while & you will be able to see it in the dark. You may ask, How much does it glow?. Well, that's kind of hard to answer, you can't read by it, it won't lead Santa's sleigh, but you can see it in a dark room or campsite. This bottle is not as clear as some of their other coloured Everyday bottles but you can see a waterline. The large opening on Nalgene's wide-mouth bottles easily accommodates ice cubes, fits most water purifiers & filters, & makes hand washing a breeze. The attached loop-top never gets lost & screws on & off easily. Printed graduations let keep track of your hydration. Dishwasher safe (Please make sure the top does not touch the heating element, or it will melt).