I have these because we have about a dozen different Contigo water bottles and coffee mugs. It's the perfect size to clean anything you want in Contigo containers, including narrow mouthpieces and wider water bottle bodies, even large plastic water bottles. I am completely satisfied with the performance and quality of these brushes. One thing to note, if you have a stained coffee mug it may not be able to be cleaned with a simple detergent as it is stainless steel, but using a cleaner like Bartender's Friend or even Ajax in combination with these brushes will help clean them to keep your Contigo stainless steel tank exceptionally clean.
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