What if you could use dead batteries as currency? It’s now possible in Russia, thanks to an unusual vending machine. More than 15 million batteries and accumulators are thrown away in Russia every year; a serious problem, given the fact that a single battery can pollute more than 20 square meters of earth with heavy metals. Hence the vending machine co-created by Volkswagen Think Blue, the auto-maker’s eco-initiative, and DDB Russia. Installed at high-profile sites in Moscow, the THINK machines enable users to pop in their old batteries in exchange for VW-branded goodies and eco-products. One machine can collect around 1,000 used batteries a month.