Changelog
What changed on Cups Deep that you would notice: new articles, new drinks and numbers, better pages, fixes. Newest first, added to every Friday. Follow along with the RSS feed.
- NewSave image: one tap turns the day you built on the instrument into a picture you can keep or share.
- ArticleDoes green tea have caffeine? Yes: under a third of a filter coffee by USDA's measurements, and steep time moves it most.
- ArticleWhich energy drink has the most caffeine? A four-way tie by the makers' own US pages, and a different winner per fl oz.
- ArticleHow much caffeine is in a Red Bull? Red Bull's own figure for each US can; flavor and sugar change nothing.
- ArticleDoes Dr Pepper have caffeine? Yes: more than a can of Coke or Pepsi and less than Mountain Dew, by the maker's figures.
- ArticleWhich sodas have no caffeine? Sprite has none, and most root beer and ginger ale has none either; the traps are the flavors.
- ArticleHow much caffeine is in Mountain Dew? PepsiCo's own figure for the can and the bottle, and Zero Sugar has more.
- ArticleDoes chocolate have caffeine? Yes: USDA's figures for dark, milk and white, and a whole bar of dark that comes close to a filter coffee.
- ArticleDoes black tea have caffeine? Yes: half of a filter coffee by USDA's measurements, and Earl Grey is black tea too.
- ArticleWhat is Swiss Water decaf? Coffee decaffeinated with water and carbon instead of a solvent, with a guarantee about the bean, not the cup.
- ArticleHow much caffeine is in Celsius? Celsius's own figure for the can, the same in every flavor, plus Essentials, the powder sticks and Hydration.
- ArticleDoes herbal tea have caffeine? Mostly no, but some teas sold under herbal names contain tea leaf.
- ArticleStarbucks drinks without caffeine: the ones Starbucks US lists, and why the Pink Drink is not on that list.
- ArticleDoes oolong tea have caffeine? Yes, and white tea too: USDA's measurement, a maker's range and what brewing does to it.
- ArticleHow much caffeine is in a 5-hour Energy? Regular and Extra Strength by the maker's labels: more than ten times a Red Bull, ounce for ounce.
- ArticleDoes Pepsi have caffeine? Yes, and in the US a can of Pepsi Zero Sugar has the same as a can of Pepsi.
- ArticleHow much caffeine is in Coke? Coca-Cola's own figures for Coke and Diet Coke, which has more, from the mini can to the bottle.
- ArticleFlat white vs latte: the flat white has more caffeine at every chain we found that prints both, though its shots are not stronger.
- ArticleCold brew vs iced coffee: at a Starbucks counter cold brew wins by a little; across brands there is no rule, because the recipe decides.
- ArticleHow much caffeine is in yerba mate? A gourd of hot mate or cold tereré is roughly a cup of coffee, but a gourd gets refilled.
- ArticleWhich coffee has the most caffeine? The biggest serving with a maker's figure, espresso per ounce, and what stands behind the strongest-coffee claims.
- ArticleIs 200 mg of caffeine a lot? It is one full dose: the single dose EFSA says raises no safety concern for healthy adults, and half the daily figure.
- ArticleWhy does caffeine make me tired? If you drink it every day, mostly because of withdrawal; sugar and short sleep add their own.
- ArticleDoes coffee dehydrate you? Not at everyday doses: a trial of four mugs a day against water, and where extra urine does show up.
- ArticleDoes boba have caffeine? Yes, whenever there is tea or coffee in the cup; the pearls carry none.
- ArticleDoes kombucha have caffeine? Yes: every one in a lab test of US supermarket brands had some, and the highest lists added caffeine.
- BetterEvery page now ends with a drawing of Asunción, Paraguay, one for light mode and one for dark.
- FixedThe Coke Zero article now gives its bottles by Coca-Cola's own label pages instead of our scaling from the can.
- NewResources is open: caffeine questions answered with the number first, the long version after, and every figure linked to its source.
- ArticleHow much caffeine is in a cup of coffee? The USDA figure for a brewed cup, and why there is no such thing as one cup.
- ArticleHow much caffeine is in a shot of espresso? The USDA figure for a single and a double, against what the chains state.
- ArticleCappuccino vs latte: the same espresso under different milk, so the caffeine follows the shots.
- ArticleDoes decaf coffee have caffeine? Yes, a little: the FDA range for a cup, and how far one shop's decaf shots spread.
- ArticleDoes matcha have caffeine? Yes: a thin bowl is level with a shot of espresso, a thick one doubles it.
- ArticleDoes chai have caffeine? Yes, from the black tea: a cup of tea against a coffee-shop chai latte.
- ArticleDoes Coke Zero have caffeine? Yes, the same as regular Coca-Cola, and Diet Coke has more.
- ArticleHow much caffeine is in a Monster? The original can by Monster's own figure, and how far the range runs.
- ArticleHow long does caffeine stay in your system? The half-life in a healthy adult, and how much it varies between people.
- ArticleCaffeine withdrawal: the symptoms, when they start and when they stop.
- BetterThe front page now shows the newest articles under the instrument.
- BetterA proper menu on phones, with a line under each page saying what is there.
- FixedThe button at the end of an article opens the instrument at the top, not halfway down the page.
- NewThe instrument: add your coffees, teas and energy drinks and see how many milligrams are still in you at bedtime.
- NewThe method: half-life, peak time, daily limits and sleep, with the equations and every source behind the curve.
- NewDrinks: caffeine per serving for coffee, tea, mate, colas and energy drinks, with the published range and how sure each number is.
- NewThe raw numbers as a file anyone can fetch and cite.
- NewAbout: who is counting the caffeine, and why.
- NewPrivacy: what the site counts, and a way to say no to all of it.
- BetterLinks to Cups Deep now show a proper preview card when you share them.