Actually, won't the portals being so close to each other mean that anything you say will feel like two phones calling each other <i>very closely</i>,(reply>), i think the bottle is meant to represent something much larger and the real portals to scale would be very large and very far apart.,(reply>), Not moresof than sound bouncing off a wall before reaching your ears will sound like an echo of what sounds reach your ears directly. Sure that kind of echo can be annoying but often those kinds of echos interact with other echos and cancel each other out more or less.,(reply>), Probably