Potty or cup?

We received a toddler potty from our neighbor that got it for his grandkids and never even opened the box.  It has been sitting on the shelf for many months.  Well, I decided we would bust out the potty and sit it in the bathroom so Zach can get used to its presence.  He doesn't miss a beat and has been more interested in the bathroom....aka no one in this house pees alone.  I also learned he will sit on the potty so I can actually pee without yelling at Zach to stop climbing the stairs or playing with the oven knobs, it was a win win.  Well, almost a win win.  This particular potty has a cup that catches the stuff that just lifts out the top.  Zach has figured out how to lift out the cup and pretends to drink out of it, complete with an ahhh after like it was so refreshing.  It is important to note there has never actually been any pee or poo in the potty, but anyway you look at it, it's gross.  We're going to search for a new potty that apparently locks in the pee so no one can drink it.  I'll add this to the list of weird stay at home mom problems.