BEST invention for work and even school!
This is a water bottle with a filter built inside. I LOVE LOVE this thing. It has saved me so much money. The filter system works really good and makes fountain water taste like bottled water.
I try to drink 8 cups of water or more. Its hard to bring lots of bottles of water with me to work (its not only inconvenient but HEAVY too!). The water fountain in my building tastes like iron and all things you DO NOT want to taste. This water bottle makes it taste so much better!
You can purchase one here http://www.waterbobble.com for $8.99-$12.99 depending on the size.
DISCLAIMER: I purchased this myself.