Scott Reeder (who is a prop master and makes short videos on about his craft on various platforms) has weighed down disposable cups a couple different ways. One

Scott Reeder (who is a prop master and makes short videos on about his craft on various platforms) has weighed down disposable cups a couple different ways. One was dropping a mini water bottle into the cup, and another was dyed food grade silicone (for when the shot required a cup with the lid off).