Walking in a busy city with a giant latte in your hand. Looks cool on TV, but in real life, you need to get something in your bag with just one available hand, someone bumps into you and your latte is dripping down your sleeve, if not down your chin.
And then you drink the coffee and within 5 mi a you urgently need to pee it out.
Expensive designer's clothes. They always need to go to dry cleaning, especially if you drink a giant latte in the streets.