Catheters should be drained into a drainage bag which can be emptied whenever necessary. The catheter and drainage bag are part of what is called a closed drainage system. The system should be closed (bag connected to catheter and bag tap closed) unless the bag is being emptied or changed. It is important for the person who is emptying the bag to wash or sanitise their hands before and after handling the bag.
You will need two different kinds of drainage bag; a leg bag and an overnight bag or collection device.