Why Does a Tonic Americano Splash When Stirred?

Manner's Huangpi Tonic Americano and caffeine-free Huangpi Tonic Special Drink, both 15 yuan and sold only via mini-program or in store, combine Huangpi juice, tonic sparkling water, and espresso. Stirring releases carbon dioxide quickly, so foam erupts over the rim. The same thing happened last year with Manner's Ginger Americano, and takeaway and personal cups both overflow.

Baristas build these drinks by adding juice first, then sparkling water, then pouring espresso on top, leaving layers that need mixing. To avoid a mess, let the drink settle, stir gently with a straw rather than a spoon, sip before covering the lid, and never shake the cup. Whether served as americano iced or hot, the carbonation behaves the same way.

Manner stores nationwide have recently launched a new Huangpi Tonic Americano and Huangpi Tonic Special Drink, priced at 15 yuan, available only via the mini-program and in-store ordering. Because they contain tonic sparkling water, stirring can easily cause foam to erupt, and social media has been flooded with "victims" sharing their embarrassing experiences — takeaway cups and personal cups alike are hard-pressed to escape. This article sorts out the science behind the splatter, baristas' coping techniques, and netizens' summarized anti-explosion tips, along with related recommendations from Front Street Coffee, to help coffee lovers safely enjoy this new product.

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"Manner, you... I'm so embarrassed" "The Huangpi Tonic Americano is a splatter warrior" "Manner Huangpi Americano victims have appeared" "Don't order the new Huangpi Tonic Americano! It will explode!"

Recently, a large number of netizens claiming to be "victims" of Manner's new product have emerged on social platforms, sharing their "social death moments" after buying the coffee. Whether it's a takeaway cup or a personal cup, the scene of foam overflowing and erupting leaves people flustered.

The story began when Manner stores nationwide recently launched two Huangpi-flavored drinks: a caffeinated Huangpi Tonic Americano and a caffeine-free Huangpi Tonic Special Drink, both priced at 15 yuan. According to the official introduction, both products contain Huangpi juice and tonic sparkling water. Due to the nature of sparkling drinks, Manner's tonic water coffee this time is likewise only available via the mini-program and in-store ordering.

Because sparkling water is added, to present the high-appearance, layered coffee shown in the ads, baristas need to first add the juice, then pour in the sparkling water, and finally inject the espresso. At this point the flavored concentrated juice sinks to the bottom of the cup, and the tonic water has not yet merged with the coffee liquid, so it needs to be stirred before drinking.

However, this stir "exploded" another group of victims. Why "another"? In fact, Manner launched a sparkling coffee called "Ginger Americano" last year, and at that time a large number of customers had already experienced the "explosive" power of tonic water coffee.

As more people try it, the group falling victim to this tonic water coffee keeps growing. Some accidentally spray it into a Baotu Spring fountain when putting on the lid, some want to take the coffee back to their desk to sip slowly but keep "spitting" it all the way, some have clothes and bags ruined, some have mice and keyboards affected... truly laughing one second and crying the next.

The reason this kind of drink overflows and sprays is mainly that tonic water quickly produces a large amount of bubbles and keeps rising after hot espresso is added. If you then stir with a straw or shake it vigorously, the foam expansion is further intensified. When the cup mouth used to make the coffee is too small or the capacity is insufficient, splashing also occurs, which is why everyone keeps getting "exploded."

Of course, quite a few netizens have escaped "being sprayed." For example, this refined friend came up with an " anti- explosion tip ," directly using 2 personal cups to separately store the tonic water and coffee liquid, chiefly embodying "as long as you're not in a hurry, this coffee can't spray me." Someone else cleverly brought an extra- large-capacity coffee cup, which not only perfectly holds a 16oz coffee, but even accommodates all the foam that bubbles up later from stirring.

Perhaps from the experience of frequently wiping tables, Manner's baristas have had to develop a set of skills for making sparkling coffee: first confirm the size of the personal cup, then the action of pouring the espresso must be gentle; if it's too full, let the customer take a sip first, then continue pouring. If the cup is really too small, the barista will pour only half the tonic water, leaving the rest for the customer to take back and add while drinking.

And baristas who have seen it all can finally only use standee signs to remind those customers who order this kind of sparkling Americano and still insist on taking it away:

Image source: Xiaohongshu

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The above content is compiled by CoffeeHunters, a coffee news website.