Zichen Jin, Hong-Gyu Seong, Satyam Srivastava, Alex McGlasson, Todd Emrick, Murugappan Muthukumar, Thomas P. Russell recently published in the Angewandte Chemie International Edition. This paper entitled, 3D Printing of Aqueous Two-Phase Systems with Linear and Bottlebrush Polyelectrolytes explains how a new polyelectrolyte complex, comprising anionic bottlebrush polymer and cationic linear polymer, exhibits a broader phase separation diagram and higher salt resistance capacity and varies from spherical-like to core-shell-like conformation. Utilizing this system creates a tubular-like flow structure at the interface of two aqueous liquids, enhancing the structural stability, and offering a more efficient and easy method for particle transport.