This little novelty beer glass (made of plastic) looked quite good and fun on the website, luckily it's also not too expensive. Sadly though the functionality is quite poor and not well thought through. The action of ‘hitting’ the ball sometimes fails as the arm used never makes direct contact, instead relies on kinetic energy through the plastic which sometimes doesn't give it enough speed to cross the gap. (Used to get the ball back to the top to hit it again.) To get the ball back to the top to hit it again, you need to almost invert the cup, as the whole system is fully enclosed which means you can't physically touch the ball, making putting anything in it basically impossible. Unless you poor it all over yourself.