Algae Bottle

Today I discovered something horrifying.....

I found out that the nalgene bottle in my room which I always drink water from has a layer of algae at the bottom of the bottle ! arghh! How long have I been drinking these algae water ? weeks or months?
I didn't really notice it, since my bottle colour is yellow, so it's not really obvious to spot them. I thought it was because I used the bottle for quite long, that's why a bit discoloured. But taking a closer look I could actually see abit of particles on the inside of the bottle surface.

Helppp ! am I going to die?? I can feel layers of algae growing inside me!!!

Lesson of the day: Clean the water bottle in your room at least once a week?