The Carbolic Smoke Ball case is the origin of the expression "mere sales puff" . The court said, in essence, if the claims made in advertising are so obviously fanciful, then they are mere sales puff and and no reasonable person would rely on them.

Did this open the door to the outrageous lies told by companies today, the excessive hyperbole in advertising?

Or was it a sensible approach saying, in effect, that companies can use exaggeration to attract attention? 

This shirt and associated products celebrates one of the most important cases in the law of contract. 

It's the perfect conversation starter, or statement, for lawyers and people in advertising.