Photo: HUMICOTTA is a 3D-printed ceramic humidifier. It is bacteria-free, easy-to-clean, and energy-efficient. It consists of a base module and a filter part. The base is a cylindrical pedestal with a built-in fan on which the filter can be placed. The filter is a 3D-printed honeycomb structure made of diatomite. When water is added, the honeycomb structure and the microspores of the diatomite maximize natural humidification. HUMICOTTA also offers an open platform service that customizes filters or provides files that users can download to print using their own 3D printer. (credit: KAIST)