Portals were added in 1.3.2 and is still in 1.4.1. They allow you to teleport to another of the same color. Just place it and right click to teleport to the other. They cannot change position once set. They will teleport you incorrectly if you place them and remove them again. The message Portal 1 set will be displayed and thereafter Portal 2 set will display to indicate everything is working. Right click to teleport.