Here's a huge pet peeve of mine. You've seen this at every Homey Fall Fest, anywhere a bunch of single speed mtb'ers can be found.
You see, normally it'd be a water bottle holder, but it's not. It's for a flask, because you know, I want you to think that I drink. Get it?
A real drinker (someone who can hold their shit) has no need to be showy about it, and they understand that flasks go in your back pocket.
The only reason to have one mounted on your bike is to impress others and the only thing it will get you is your whiskey drank up by people who aren't you.
So stupid. Take your Fox jersey and your flask holder and fuck off someplace.