What's the worst case of false advertising you've seen?

Why is a toothbrush named that? I have teeth- should be teethbrush👅

Sugar free tictacs. They are about 95% sugar, but as they define a serving as one candy, which is only half a gram, there is less than half a gram of sugar per serving and that legally qualifies as sugar free.

Batteries not included each set sold separately

the champagne of bottled beers