Brown dot on my nose

Oie. Quite a few times while at work I have noticed a brown dot on my nose. Always in the same place. At first I thought it was mud that was kicked up from my bike ride in, but that's strange 'cause I have a shower after I get to work... Very weird.

I just figured it out: my travel mug that I use at work has a flip up lid. The part that was touching the opening for the coffee is now at the perfect place to come into contact with my face as I take a drink. Perhaps not an optimal design, ah well. Good thing is that it's a pretty tough mug and I like that fact that it's see-through. :-/