It's like the night sky came down and fell on this mug! It has triple insulation technology so it will keep your drink cold for up to 9 hours and hot up to 3 hours. You'll love this mug for traveling across the state or to your couch. Most importantly, this mug and BPA-free lid are dishwasher safe on the top rack. The silicon bottom is scratch-free, slip-free, and noise-free. Don't wait on these amazing Starry Night Mugs, they'll go fast.