
Ever wondered what it would be like to shove your mouth into a three-gallon mound of glistening, wobbly jelly? We’ve got all the crazy photos after the break!
Ever since our Japanese team bought a giant novelty Starbucks mug last year for a whopping 86,400 yen (US$700), they’ve been coming up with creative uses for it, proving its worth as a gag product and as a handy cooking tool in the RocketKitchen. Now it’s time to whip out the giant 20-pound beast for another RocketNews24 food event, this time in honour of Jelly Day in Japan, July 14.
▼ The beer can below helps to give you an idea of the size of the giant coffee mug.
With July 14 sounding similar to the word “gelatin”, the date has been promoted as “Jelly Day” by the Gelatin Manufacturers Association of Japan. To celebrate, our Japanese reporter P.K. Sanjun led the team in a jelly-making event of giant proportions, starting the night before by setting the dessert in the oversized mug, using twelve bags of jelly in four different flavours.
▼ With a kettle and two pots on the boil at the same time, it took P.K. about two hours to mix 12 litres (3 gallons) of boiled water into the mug with the jelly crystals.

▼ Then it was time to cover the mug with plastic wrap and place it in the fridge overnight to set.
By the time P.K. arrived at the office the next morning to check on his masterpiece, it looked like it had set with a nice glossy coating on the surface.
But the truth would be revealed with the ceremonial serving of the jelly, which would be poured out of the mug and onto the plastic-covered table.
Had the jelly solidified inside? Or would it be a huge runny mess that would trickle over the sides of the table and onto the floor?
Everyone held their breath as P.K. gently tipped the contents of the mug out onto the table.
▼ There she goes!
The look of awe on the faces of P.K. and Mr Sato say it all! Jelly Day had truly arrived in the office with the glorious centrepiece looking far more beautiful than any of them had ever imagined!
▼ The gorgeous concoction deserved some manga-fication to emphasis its true greatness.
The only thing left to do now was taste. Mr Sato happily led the way by latching his lips onto one side, slurping the wobbly, fruity goodness into his giant gob.
Yoshio went for a more seductive tongue-licking approach, happy to enjoy the texture of the smooth, cool jelly on his taste buds.
To see everyone digging into the dessert like wild animals around a carcass, take a look at the video below. Happy Jelly Day everyone!
Images ©RocketNews24
[ Read in Japanese ]


















Giant, house-sized Starbucks Mug appears in Tokyo, so Mr. Sato grabs own huge mug to check it out
What do you do with a very large novelty Starbucks mug? Make a very large dessert!
What happens when you walk into a Tokyo Starbucks dressed as a giant teddy bear? 【Video】
RocketKitchen makes a giant Hi-Chew candy from over 1,400 Hi-Chew pieces!
How to make Starbucks Japan’s American Cherry Pie Frappuccino even better
Starbucks Japan unveils new sakura cherry blossom collection for hanami season 2026
Is Tokyo Station’s startlingly expensive wagyu bento boxed lunch worth its high price?[Taste test]
Starbucks Japan releases new sakura goods and drinkware for cherry blossom season 2026
The top 5 ice creams you should try at Family Mart convenience stores in Japan this summer
In downtown Tokyo, we talk to a guy who says he’s from Orion’s belt, get called an “idiot”
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 2]
Tokyo Station staff share their top 10 favorite ekiben
Is Oni Koroshi sake in a drink box wino fuel or a hidden gem?
Admission is $30 and all the paintings are fakes – so why is the Otsuka Museum of Art so popular?
Watching Studio Ghibli’s first-ever all-CG anime was weird in weird ways【SoraReview】
Starbucks Japan releases first-ever Hinamatsuri Girls’ Day Frappuccino
Japanese restaurant chain serves Dragon Ball donuts and Senzu Beans this spring
Japan Extreme Budget Travel! A trip from Tokyo to Izumo for just 30,000 yen [Part 1]
Highest Starbucks in Japan set to open this spring in the Tokyo sky
Japan’s craziest burger chain takes menchi katsu to new extreme levels
Japan has only one airport named after a samurai, so let’s check out Kochi Ryoma【Photos】
Japanese drugstore sells onigiri at pre-stupid era prices, but how do they compare to 7-Eleven?
Viral Japanese cheesecake from Osaka has a lesser known rival called Aunt Wanda
Which convenience store onigiri rice balls are the most popular? Survey reveals surprising results
Japan’s newest Shinkansen has no seats…or passengers [Video]
Foreigners accounting for over 80 percent of off-course skiers needing rescue in Japan’s Hokkaido
Super-salty pizza sends six kids to the hospital in Japan, linguistics blamed
Starbucks Japan unveils new sakura Frappuccino for cherry blossom season 2026
Foreign tourists in Japan will get free Shinkansen tickets to promote regional tourism
The 10 most annoying things foreign tourists do on Japanese trains, according to locals
Take a trip to Japan’s Dododo Land, the most irritating place on Earth
Naruto and Converse team up for new line of shinobi sneakers[Photos]
Is China’s don’t-go-to-Japan warning affecting the lines at a popular Tokyo gyukatsu restaurant?
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
Starbucks Japan releases new drinkware and goods for Valentine’s Day
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Rice ball melon bread – A treat Japanese bakeries aren’t crazy enough to make, but we are【SoraKitchen】