First decide if you really need your own cup overlay for this or could you just make use of an episode prop
But if you really are sure on it being an overlay then you can make/get someone to make an overlay that has a cup attached to an arm overlay then you will have to move it up and to make it smooth you will need to use easing functions. Below is video on them. I can’t really explain as well as a video would. So I would recommend finding videos on youtube about them.
