# Coffee Cup Notes > Coffee stains teeth and many people hope a supplement helps. See what coffee does to teeth, what a chewable cannot undo, and practical habits that do help. ## Guides - [Why Coffee Stains Teeth](https://chewable-and-coffee-habits.vewunizi.workers.dev/coffee-staining-teeth-causes/): Coffee stains teeth because its dark pigments cling to the surface of the enamel, helped along by roughness, plaque film and frequent sipping. - [Rinsing With Water After Coffee: A Small Habit](https://chewable-and-coffee-habits.vewunizi.workers.dev/rinse-with-water-after-coffee/): A quick swish of plain water after coffee is an easy, low-cost habit that rinses away loose residue and some sugar. - [Straws, Sips and Stain: What Helps](https://chewable-and-coffee-habits.vewunizi.workers.dev/straw-vs-sip-coffee-teeth/): A straw can reduce how much coffee touches the front of your teeth, but it is not a guarantee and many hot drinks are awkward to drink that way. - [Coffee and Morning Breath](https://chewable-and-coffee-habits.vewunizi.workers.dev/coffee-and-morning-breath/): Coffee and morning breath are linked mostly by timing: the mouth gets dry and quiet overnight, and a strong cup first thing can add its own smell on top. - [When to Brush After Your Coffee](https://chewable-and-coffee-habits.vewunizi.workers.dev/timing-brushing-after-coffee/): For timing brushing after coffee, there is no single perfect minute. ## About - [About Coffee Cup Notes](https://chewable-and-coffee-habits.vewunizi.workers.dev/about/): not medical advice, how the site is funded and how guides are made ## Optional - [RSS feed](https://chewable-and-coffee-habits.vewunizi.workers.dev/feed.xml)