Instruct: Classify an Amazon review as either positive or negative.
Query: Practical and sanitary

This brush cleans really well, and the suction cup is wonderful - very sanitary and convenient. I agree with the reviewers that the brush doesn't go in as easily as others, but the trade-off is a really clean bottle with minimal effort, thanks to the firmness of the bristles. And if you hold the bottle with the opening facing down when pulling out the brush, there really isn't that much spray. As for the issues with rust that other reviewers have mentioned, I haven't had that problem, but I've only been using this brush for a month, so perhaps I'll have to amend my review at a later date. I also use this brush on my wine glasses - it's nice to know I'll be able to keep using it once the bottles are gone.