I wish there were a bottle cap filter to pop on to my water bottle ... or even on to a bottle of wine (for wine to pass thru while pouring).

My idea is to combine the designs of the Brita pitchers and Brita bottle to create a hybrid bottle/pitcher.  The Brita bottle is nice since it is portable and you can drink directly from the container.  However, I like that the pitcher filters the water when it enters the container rather than when it leaves the container as occurs with the bottle.  Also, the pull-up lid on the bottle can wear out over time and some days the bottle isn't big enough. 

First, the bottle/pitcher would have two openings.  One opening to fill the bottle with unfiltered water, and a second opening that you can drink out of or pour into a cup.  There would be a chamber in the bottle similar to the current Brita pitchers where the water is filtered.  This way, you have filtered water available rather than filtering it each time you drink out of the bottle.  The one-liter bottles are very popular and a great size to keep at your desk at work, so that would probably be a good size for the bottle/pitcher.   

My idea is A brita Filter for baby bottels. make it conveinent to carry in a diaper bag so when you need fresh water for baby all you have to do is put it on the top  of the bottel and let it drain threw and filter the water so baby has good water to drink no matter where you are.

I would love to see Britas in a range of colors. Come on, white is boring! Why not kick it up a notch with a rainbow of colors so that people can drink their water out of a Brita with a bright green, blue or pink lid. I'd also like a redesigned spout, because I always found the Brita had a tendency to spill water easily.

I must say how wonderful the personal water bottle filtration system is!  I love my new water bottle and my water intake has increased dramatically from it...but, it could be increased even further!