Packing Dice (image) American Physical Society Caption Tetrahedral dice have four triangular faces. When the dice are randomly poured into a container, they pack themselves more tightly than any other shape studied so far. Credit Alexander Jaoshvili, Andria Esakia, Massimo Porrati, and Paul M. Chaikin Usage Restrictions None 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.