How does Zippo attach emblems to their lighters?

Well, I just bought a chrome Jack Daniel's Zippo lighter with a Jack Daniel's emblem on the front, and I was just wondering how Zippo attaches their emblems, and whether it's robust or not, because I'm worried that if it's only attached with glue, it'll fall off. Has anyone here had an emblem fall off? And if so, how long did you have your Zippo before the emblem fell off?|||Lol Wut?