
This plain-looking envelope crushed every other mailer Boardroom sent for three years. It didn’t have fancy graphics or a celebrity photo. Just one massive line: “What NEVER to eat on an airplane.”
That teaser headline did all the heavy lifting. It sparked worry and curiosity in the same breath. People had to open it to find out more. The secret? It didn’t try to sell. It just poked your brain until you needed answers.