Lee Valley has the best brushes for cleaning bottles. Website is www.leevalley.com
Here is link: http://www.leevalley.com/garden/page.aspx?c=2&p=10209&cat=2,50560
I have used my set for about 2 years and just now they are starting to show wear.
Dang- I wish I could get a commission off of the sales of these brushes! I've always had a hard time finding decent ones, till I found these. Thought I would share the info with all of you.
Happy cleaning!