My pee is ALWAYS clear.. but I don't drink much water. why is this?!

Starting several months ago, my pee starting being clear. I didn;t think much of it. But it keeps happening and it's clear 98% of the time. Now you're first thought is probably, oh your system is just clean you drink water alot. But no, I know this is very bad but basically all I drink is pepsi. So why is it always clear? Please help:/