Confessions of a gear whore: Katadyn Hiker water filter

http://shop.katadyn.com/media/dimg/b4c7bbbf2c42d33fd9396bbaa684a3af.jpg?l=1

.
I own one of these. It is an excellent filter for your water needs. It has a .3 micron filter which will remove 99.9% of bacteria and parasites from your water, this isze will also remove a few viruses as well. CAUTION! If you are in an area that has viral issues with water you will want to look into addition ways to purify your drinking water. There are some filters that remove them, but I will do those later.
This filter is light and easy to use, it also comes with a carry bag and an extra bag to help keep cross contamination from occurring. It has an adjustable float to keep you from sucking mud and bottom debris and mucking up your filter. I will give a caution. If you are in an area that you have really mucky water you might want to prefilter it before you use your water filter. This will save the life of your filter and also possibly save you.

This filter also comes with attachments to make connecting to various bottles and hydration packs easy. This also avoids cross contamination.
It takes a few minutes to fill a 1 liter bottle of water, but the pump action is easy and it self primes which is a big advantage.
I also carry micropur tablets as well. You should always carry atleast 2 ways to purify water with you. A main and a back up! I think its a good rule..