World's smallest wineglass (IMAGE) KTH, Royal Institute of Technology Caption The world’s smallest 3D-printed wineglass (left) and an optical resonator for fiber optic telecommunications, photographed with scanning electron microscopy at KTH Royal Institute of Technology. The rim of the glass is smaller than the width of a human hair. Credit Po-Han Huang/KTH Royal Institute of Technology Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.