It is a brush
Are you seriously reading a review for a brush. Better yet, am I seriously writing one?

sigg brush
This brush obviously works well to clean the sigg bottles. What I don't understand is why sigg does not recommend using stiff brushes to clean their bottles when thats all this seems to be. Apparently other stiff brushes harm the interior, but theirs does not.

necessity
if you wanna clean sigg, you'll want this brush set. gets in all those hard to reach places ;)

bottle brush cleaner
Nice length to clean bottles but would like to have stiffer bristles to scrub better inside the stainless steel water bottle.

Great tool for the Sigg bottle
I'm not sure how I would clean my sigg bottle without this! I purchased this along with my bottle and I use it often. It works great and have used it on other hard to clean items such as vases. I highly recommend.