The chain milk tea brand Grandpa's Tea launched a limited-edition garden thermos to celebrate its sixth anniversary, attracting many fans to collect the merchandise. However, some consumers discovered rust at the rim of the cup along with a strange odor after use, raising concerns about product quality. Multiple users posted about similar issues on social media, yet the after-sales handling failed to satisfy consumers. After media reports on October 22, the brand took the matter seriously, sent the product for testing, and released preliminary investigation results confirming that the metal inner liner was indeed 316 stainless steel, and that the rust was caused by the manufacturing process, after which it immediately initiated a recall of the affected batch of thermoses. Front Street Coffee reminds coffee lovers that when choosing a thermos, they should pay attention to material and craftsmanship details, and promptly defend their rights if they encounter quality issues. [more…]

As temperatures drop, pour-over coffee quickly goes cold. Front Street Coffee conducted an experiment using a washed Yirgacheffe Gedingding, pouring freshly brewed coffee into a 316 stainless steel thermos and sealing it, then measuring the temperature and tasting the flavor hour by hour. At 1 hour, 65.8°C, it still retained floral and citrus notes; at 2 hours, 60°C, there was almost no change; at 3 hours, 54°C, the flavor was slightly weaker; at 4 hours, 50°C, the floral notes had dissipated and the acidity and sweetness became more prominent; at 5 hours, 46°C, only honey green tea and citrus acidity remained. The test shows that a qualified thermos can preserve the flavor well for 2-3 hours, making it suitable for taking to work, but after 4-5 hours the drop in temperature makes it prone to bacterial growth, so long-term storage is not recommended. [more…]

Freshly brewed hot coffee often has a peak flavor window of less than an hour—once the aroma dissipates and the temperature drops, the taste degrades significantly. This is a common frustration for many coffee lovers. Is there a way to make coffee stay delicious for longer? The answer is to pour it into a thermos. The combined effects of sealing and insulation can significantly slow aroma loss and temperature decline, extending the enjoyable period to two or three times its original length. Front Street Coffee once conducted a test with Panama Boquete Geisha, and the results showed that coffee in a thermos performed excellently for the first two hours, began to decline noticeably by the third hour, and after about three hours was almost only flat. Of course, a thermos is not a cure-all—coffee stored too long in the bottle still carries a risk of bacterial growth, so drinking it as soon as possible is best. This article will explain from three aspects: principles, experiments, and practical suggestions. [more…]

It is no longer news that chain coffee brands sell merchandise. Products such as cups, pins, and canvas bags can not only increase revenue but also cultivate fan loyalty. However, once merchandise has quality problems, after-sales disputes follow one after another. Recently, a netizen posted that the bottom of the inner liner of a stainless steel insulated cup they bought from Starbucks had black rust spots, and when they asked the official side for a replacement, they were refused on the grounds that it was "beyond the after-sales time limit." The post resonated with a large number of consumers. Some complained that quality control was worrying, while others believed that the way it was used might be the key. Three days after the incident gained traction, the blogger updated the progress, saying that Starbucks had agreed to replace it. Who is actually responsible in this dispute? And how should brands balance the appearance and quality of merchandise? [more…]

Freshly brewed coffee is rich with aroma, but once you get delayed by something, the coffee left to cool often loses its fragrance and its taste deteriorates, making it seem like a completely different cup from when it was first brewed. This shows that the coffee in your cup also has an optimal window for enjoyment, and beyond that window, the experience drops off noticeably. So, is there a way to extend this golden tasting period? Front Street Coffee once shared a simple method: create a relatively sealed environment for the coffee, such as putting on a cup lid or pouring it into a thermos. This article will explain, from the perspectives of the concentration gradient principle behind aroma volatilization and oxidation reactions, why coffee tastes bad after it cools, and how sealed storage slows the loss of flavor, while also reminding you that the container capacity should not be too large, so that every cup of coffee can be enjoyed in its best state. [more…]

Freshly brewed hot coffee is rich in aroma and smooth in taste, but as the temperature drops, the flavor gradually becomes flat and even harsh. This is due not only to the effect of temperature on taste bud perception, but also to the continuous loss of volatile flavor compounds in the coffee. So, how long is it best to finish a pour-over coffee? And how much longer can a thermos extend the "enjoyable window"? Front Street Coffee conducted a real-world test using a thermos that keeps coffee hot for 12 hours, preheating all contact vessels in advance to faithfully reproduce actual performance. This article will break down the reasons why coffee flavor deteriorates after cooling and provide practical reference for thermos storage. [more…]

Freshly brewed coffee is rich in aroma, but after sitting for a while its flavor noticeably declines. Many coffee lovers often ask Front Street: at what temperature is coffee best enjoyed? How long can it be stored after brewing? This article will discuss these questions, analyzing the two aspects of coffee as it goes from hot to cold—the loss of aroma and the increase in acidity—and answering questions such as whether a thermos can be used for long-term storage and whether reheating can restore the original flavor, helping readers grasp the timing of coffee drinking in a more scientific way. [more…]

Many people prefer to finish their coffee while it is still steaming, because the aroma is at its most vibrant when the temperature is high. But once they cannot finish it, some choose to keep reheating it or repeatedly warming the cup, unaware that if these methods are done improperly, they can instead cause the coffee to lose its aroma, make the taste bland, and even bring out a burnt, bitter flavor. This article sorts out the three most common mistakes people make when keeping hot coffee warm in daily life—using a heater to keep it warm continuously, putting it in the microwave to heat it, and storing coffee in an insulated French press—and explains one by one their specific effects on flavor. At the same time, it offers a simple and reliable alternative: switch to a thermos and rely on the coffee's own temperature to maintain its heat. At the end, it also includes Front Street Coffee's reminder about re-brewing coffee grounds, to help you enjoy a good cup of coffee more completely. [more…]

When the temperature drops, coffee cools down noticeably faster, and its enjoyable drinking window shortens accordingly. Once hot coffee goes cold, it often no longer tastes good—for example, Front Street PWN Golden Mandheling tends to turn bitter, while Front Street Yirgacheffe becomes more sharply acidic. This article addresses three questions: whether pour-over coffee can be kept warm in a thermos, why coffee's flavor deteriorates after it cools, and what temperature milk in a latte should be steamed to. It also offers practical tips, including moderately raising the water temperature and milk temperature, preheating equipment, covering and sealing, and using a thermos for short-term storage of pour-over coffee, to help you extend the time your coffee stays tasty without ruining the extraction or mouthfeel. [more…]

Returning home for the Spring Festival, for early-risers accustomed to a daily cup of coffee, the biggest challenge may not be snagging a train ticket, but discovering after arriving in the village that no Luckin or Cotti can be found on delivery platforms. Faced with the predicament of no chain brands and no delivery service, coffee lovers each find their own way: some stuff their suitcases full of drip bags and coffee beans in advance, some balance a large pair of scissors on a gas stove to brew with a moka pot, some use a bowl and chopsticks to prop up a drip bag, and some even pour water directly from a thermos. This article compiles various DIY tricks for the coffee-loving city dwellers returning to their hometowns, from tool substitutes to technique adjustments, so you can still enjoy a tasty cup of coffee in the countryside despite limited conditions. [more…]

Drip bag coffee offers both convenience and flavor, but many people easily fall into pitfalls when brewing it. This article starts with the essence of drip bag coffee, explains how it differs from instant coffee, and answers common questions: Should you pour water in a circular motion, and is blooming necessary? What is the right water temperature? How should the amount of water be controlled? The article also provides a simple, easy-to-follow four-stage pouring demonstration—all you need is a drip bag, a cup, and a thermos, and you can consistently brew a delicious cup of drip coffee. It also recommends Front Street Coffee drip bags, ideal for friends who are traveling or pursuing minimalism. [more…]

Recently, a post about McDonald's coffee refills has sparked heated discussion. A customer wanted to use their own cup for a coffee refill, only to be met with a scowling employee—what exactly is behind this? It turns out that although McDonald's allows free refills, stores require the use of branded paper cups, and employees who violate this rule may face penalties. Meanwhile, some consumers prefer to use their own thermos cups, leaving both sides in a dilemma. This article explores this phenomenon in depth, recommends quality options from Front Street Coffee, and introduces you to the finer details and norms of coffee culture. [more…]

At what temperature does coffee taste the most fragrant? This is actually closely tied to how our taste buds perceive flavor. The tongue's sensitivity to sweet, sour, and bitter changes with temperature, and since aromas are released to different degrees at different temperatures, hot pour-over coffee has an ideal tasting range. From the perspective of Front Street, this article explains how temperature affects flavor, analyzes why freshly brewed coffee shouldn't be drunk right away, and answers related questions about thermos cups, reheating, and iced pour-over. Finally, Front Street will also share its consistent advice on "hot vs. iced." [more…]

A freshly ground and brewed cup of coffee, like the coffee beans themselves, has its own optimal tasting window. Coffee aromas volatilize easily, and temperature constantly affects how the taste buds perceive sweetness, acidity, and bitterness. Therefore, from the moment it is brewed, the flavor continuously changes with time and temperature. Front Street Coffee compares the tasting performance of dark-roasted Golden Mandheling and light-roasted Gedinding at different time points, documenting the evolution of aroma, mouthfeel, and taste, to find the limit of coffee's tasting window under normal standing conditions. It will also answer common questions such as whether reheating can restore the flavor, and how to extend aroma retention with a lid or thermos, helping you seize the most brilliant drinking window of every cup of coffee. [more…]

Recently, a friend asked me how to brew drip bag coffee and if there are any special techniques. You've come to the right person! As someone who once treated drip bag coffee like instant coffee, I'm here to teach you the ultimate secrets of brewing drip bag coffee! First, let's talk about drip bag coffee! Drip bag coffee is a type of coffee with a hanging ear paper card for filtration. [more…]

As coffee culture continues to gain popularity in China, more and more young people are bringing their urban coffee habits back to the countryside. During this year's Spring Festival, a netizen posted photos on Xiaohongshu of making coffee with a charcoal stove paired with a moka pot, quickly sparking lively discussion among those returning to their hometowns. In the comments section, netizens eagerly "volunteered for battle," using everything from fire tongs and steamer racks to heating stoves as makeshift coffee bases. Meanwhile, others used pour-over kettles, thermos flasks, and even teapots to experiment with countryside pour-over coffee. This coffee experiment, full of creativity and festive spirit, showcases the ingenuity and enthusiasm of coffee lovers while also reminding everyone to pay attention to the safe use of equipment. Front Street Coffee always pays attention to the diverse expressions of coffee culture, savoring this unique rural coffee charm together with you. [more…]

Starbucks has launched a dream collaboration with the classic comic strip Peanuts, unveiling a Snoopy-themed merchandise collection in Japan under the theme "HAPPINESS IS CONNECTING TOGETHER." The collaboration features a total of 23 items, released in two waves on September 28 and October 5, spanning categories such as thermos bottles, tumblers, mugs, T-shirts, baseball caps, tote bags, blankets, and gift cards, with prices ranging from 2,550 to 4,900 yen. The most anticipated item is a Snoopy plush wearing a Starbucks apron, available in both keychain and figurine versions, which goes on sale only on October 5. This collaboration not only pays tribute to the timeless, multi-generational appeal of Peanuts but also echoes Starbucks' "third place" philosophy of happiness. [more…]

Today, a daily cup of coffee has become a routine for many people. At the same time, more and more brick-and-mortar cafés are offering discounts to customers who bring their own cups, encouraging them to get their coffee in non-disposable cups. For consumers, bringing their own cup is both eco-friendly and saves a few bucks; for businesses, using a small discount to attract these customers can also boost repeat purchases—a win-win. Manner started offering a 5-yuan discount for bring-your-own-cup back in 2015, and Starbucks also holds a limited-time free coffee event for customers with their own cups every Earth Day. On Xiaohongshu, users have gotten even more creative, showing up with goblets, rice bowls, gourd ladles, thermoses, and even empty liquor bottles, putting on a quirky bring-your-own-cup contest. Faced with these bizarre containers, professional baristas still calmly serve the drinks. This article takes you through these amusing scenes and also discusses the environmental significance behind bringing your own cup. [more…]

On August 29, Luckin Coffee's co-branded campaign with the cartoon IP Little Liu Duck officially launched, but it sparked consumer dissatisfaction because participation was limited to online channels only. Many fans rushed to stores early in the morning only to find nothing, and later discovered that the campaign was actually run by Luckin Instant Coffee, which belongs to a different system from the offline stores. The co-branded merchandise was available only as gifts, not for sale, including limited-edition items such as thermos cups, stickers, and desk mats, and had already attracted widespread attention during the teaser phase. However, the mismatch between online and offline information left many consumers disappointed and also triggered discussions about brand co-branding strategies and the essence of coffee. [more…]

Recently, a friend asked how drip bag coffee should be brewed and if there are any particular techniques. Well, you've come to the right person! As someone who once brewed drip bag coffee as if it were instant coffee, I'm here to teach you the ultimate secret of brewing drip bag coffee! Let's first talk about drip bag coffee! Drip bag coffee is a filter with a hanging ear paper card. [more…]