A portable urinal is arranged for coupling with a bottle having a bottle opening, wherein the portable urinal includes an urine collector having a funnel channel for receiving urine expelled by a user, and an attachment head including a detachable lid extended from the urine collector for detachably coupling at the bottle opening of the bottle, and a tubular urinal guider extended from the detachable lid for inserting into the bottle opening of the bottle when the detachable lid is coupled at the bottle opening of the bottle so as to guide the urine into the bottle from the funnel channel. After use, the portable urinal is detached from the bottle and a bottle cap is re-placed at the bottle opening to seal the urine in the bottle.
