i know about the pink, i am just saying that it is not pink from the factory. If you want EVERYTHING out I would use this tool.
To make sure everything is out drain it like normal and also disconnect the tubes from the radiator and drain them. With the system lift the back end up and then do the front end. Connect everything back up and connect the tool i have pictured above.
If you are going to use a tool like that post again and I will do a write up.