Everyone wishes they had a little relief from the heat when it’s the middle of Summer, but not everyone has access to an air conditioner. So a Bangladeshi inventor named Ashis Paul decided to take matters into his own hands, and figure out a way to give everyone a way to have cold air when they need it most.

To get started, he gathered as many plastic bottles as he could and started placing them in a board. By the time he was done, he’d invented something that might change the world.