Water Bobble

So you're at class and your bottle of water runs out, what do you do? You go out to the hall fountain and fill it up, one problem though, that hall water is grimy and just because the bottle says Fiji doesn't make the new stuff clean. Thanks to Water Bobble, problem solved. With this on the lid, you filter the water as you squeeze it from the bottle to your mouth. One filter lasts for like 300 bottles so drink up.