The Cubed Restaurant Sketch

In the Cubed Restaurant Sketch from Episode 26, Jim and Jenny Johnson visit the pretentious ‘Cubed’ Restaurant where waiter, Grent, and manager, Madelle, work. 
At the restaurant guests are apparently given large cubes to photograph and 'hashtag' instead of food and drink.  Jim gets so frustrated at being charged $500 for an expensive ‘champagne’ cube (that he can't even drink) that he and his wife become larger and larger - and more rotund - until they pop.