Of course! Cold brew makes for an excellent iced coffee, and it's super easy to make with a Rumble Jar or Rumble Go. Just brew a batch normally, but make sure to use more grounds in the filter than you normally would. Consider filling up the filter to the highest notch. The reason is that once you pour your fresh-brewed coffee over ice, the ice starts to melt and dilute your coffee, so starting with a a stronger concentrate will counteract any watery taste.