A few weeks ago I went hiking at Sleeping Bear Dunes and before my trip I went to fill my water bottle at the restroom. Adjacent to the drinking fountain was this bottle filler that, as you filled, tallied up how many disposable plastic bottles you prevented from being thrown away as waste. Despite being a simple feature, it gave a powerful message on the preservation of natural resources and was a great way for the National Park Service to seamless blend technology and conservation.