When I started six months ago The Mundane Manager handed me a pair of Tim Horton's pants that smelled like a lingering fart in a musty basement. The pants didn't have a button above the zipper, either.
The smell is a little better after many washes, but the button is still missing.
And without a button, my zipper is almost always either down, or on the way down. I would estimate that I have probably handed out around 1,000 coffees with my zipper completely down.