In this episode called "Still Aging" Bill and Judy's mom go to the casino instead of the eye doctor. The second time they go with Linda. While Judy's mom is rolling dice and stuff, there is a close up of Linda drinking. Then on the front view you don't see any sign of a glass or a water bottle. Then there is another close up and you see Linda drink again then put the glass down into the gambling box (not sure what it's called--the thing where you roll the dice). Then they show the front view again and there is no glass.