Here’s a canoncal response. She finds an object in her far right cup, turns around, and places it in her far LEFT cup. This preserves the object’s EGOcentric position in front-back space (i.e. far, far) but preserves its ALLOcentric position in left-right space (e.g. window-side, window-side).

*Egocentric* coordinates are centered on the body (e.g. my left) and so turn with the observer. *Allocentric* coordinates are based on the environment (e.g. East-West, uphill-downhill), and so stay put even if you don’t.