Been using the Travel Berkey (w/black filter elements) at home for a little while now. (I house sit quite a bit and wanted something portable) Its a great filter, simple to use and clean, and works exactly as advertised. (It really does remove food coloring) IMO the Travel Berkey is good for 2 people daily use. Anything more I'd go for a larger model. Got mine from these guys.

http://www.jamesfilter.com/