Ever wonder how much good you’re doing–and money you’re saving–with that reusable water bottle? Aftefact’s Fernd Van Engelen did, and he’s come up with the 999bottle–a concept bottle that lets the user keep track of how many times it’s refilled. An app interprets the number and presents it in a visual way (e.g., at 147 bottles, you’ve saved $326 and seven gallons of oil by replacing a stack of plastic bottles that would run 15 stories high). Social media is also integrated into the concept, with groups of friends able to visualize their collective contribution.

Read more about it on Artefact.