What water filter system or brands are you using?

Currently I am just using the Brita water filter flask, and changing the filters every 3-6 months. There is also a CNA video on talking point that talks about the need for water filters, not entirely necessary for one. Yet most people choose the water filters mainly for the taste.

So...

• What brands of water filter work for you?
• From the sink? An entire unit? Or a flask type?
• Did you get it for convenience? Aesthetics?