Ito En Oi Ocha Green Tea – Steady Caffeine Pick-Me-Up for Home Office Focus and Deep Work Blocks
Ito En Oi Ocha Green Tea – Steady Caffeine Pick-Me-Up for Home Office Focus and Deep Work Blocks
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Why you'll love it
- Only 5 calories with zero sugar or artificial sweeteners, making it guilt-free versus sodas and flavored coffees
- Authentic Japanese first-flush whole-leaf brewing delivers real tea flavor instead of the powdery taste common in competitors
- Ready-to-drink convenience in portable bottles removes the steeping time of loose leaf tea
- Naturally rich in catechin antioxidants, supporting a wellness lifestyle without supplements
- Clean ingredient list (purified water, green tea, vitamin C) with no artificial colors or flavors
- Multiple size options (16.9 oz singles or 67.6 oz larger bottles including a bolder brew) let households or offices match consumption pace
Perfect for
- Mid-morning or mid-afternoon caffeine boost at the office without added sugar
- On-the-go hydration substitute for soda during commutes or travel
- Post-workout refreshment with catechins and electrolytes-like replenishment
- Pairing with Asian meals (sushi, bento, ramen) as an authentic beverage
- Packing in lunchboxes or coolers for picnics, road trips, and outdoor activities
ITO EN Oi Ocha
Oi Ocha is a top brand for Japanese tea Drinks and pays great attention to the aroma and taste of freshly brewed, Japanese teapots (Kyusu) made tea. We offer a wide range of bottled teas, tea bags, matcha powders, and loose leaf teas. Our brand name hails from a word that relates to the desire of drinking tea at home with one's family. We purchase our tea directly from tea farmers in the pursuit of the finest aroma and taste.
Ohtani's Kind of Refresh
With Shohei Ohtani as the global brand ambassador for Oi Ocha and a proud partnership with Major League Baseball, we celebrate excellence on and off the field. Our green tea is crafted to deliver clean, authentic refreshment, inspired by tradition and perfected for modern lifestyles.
Unsweetened Green Tea
Our signature drink. Pure, authentically brewed Japanese green tea with the integrity and essence of the whole leaf tea and all its health benefits.
Unsweetened Bold Green Tea
A brew for those who prefer a much bolder tasting green tea than Oi Ocha. Plus, it's even higher in the antioxidant catechin.
Golden Oolong Tea
The tea leaves used for this Golden Oolong are flowery, fragrant "Golden Cinnamon" and hearty and ripe "Iron Goddess". Oolong tea is semi oxidized, making it unique from green and black teas.
Jasmine Green Tea
ITO EN Jasmine Green Tea uses jasmine flowers that have been picked when the blossoms are at the peak of their fragrance.
Product InformationWHOLE LEAF TEA: Oi Ocha Green Tea is brewed from first flush whole green tea leaves grown in Japan not from tea powder or concentrate; using the whole leaf means our teas don’t lose any of the health benefits that are naturally present in green tea leaves
CLEAN AND REFRESHING: Oi Ocha Unsweetened Green Tea has is natural clean tasting and refreshing; putting our iced green tea in a convenient ready to drink bottle means you can have your hydration on the go; it makes a great alternative to traditional sodas
LOW CALORIE: ITO EN's Oi Ocha Green Tea has no sugars or artificial sweeteners, making it a delicious, substitute for your usual sugary soda or flavored coffee at only 5 calories; try our naturally vitamin and antioxidant rich tea, and you may never look back
ANTIOXIDANT RICH: brewed from premium Japanese loose tea leaves, Oi Ocha provides natural catechin tea antioxidants and other healthy goodies; a key to good health, happiness, and wisdom, green tea is the perfect refreshment for your health and well-being
NO ADDITIVES: ITO EN teas are brewed with no artificial colors or flavors so you can be confident that the only things in our bottles are delicious, healthy green tea and natural flavors; it's a refreshing beverage you can always feel good about drinking
Oi Ocha is Japan's No. 1 green tea brand and it means "Tea, please!". Made by Ito En, Japan's foremost tea purveyor, our unsweetened green tea is brewed from prime, first flush tea leaves harvested in Spring. Using decades of green tea expertise, our classic Oi Ocha unsweetened green tea brings you the most refreshing and authentic green tea taste in the iconic green bottle.
About Ito En
ITO EN is the world's premier green tea company and innovator of healthy beverages dedicated to creating authentic products that embody the company's five principles of Natural, Healthy, Safe, Well-designed and Delicious. Established in Japan in 1966, ITO EN is specifically known for its commitment to tea expertise and high quality standards that are reflected across all of its award-winning brands-TEAS' TEA Organic, Oi Ocha, and Matcha LOVE. Dedicated to authenticity while creating global innovation for the beverage industry, ITO EN is ranked as one of "50 Companies Changing the World"(Fortune) for its commitment to sustainability and promoting a healthier lifestyle.
Ingredients
Purified Water, Green Tea, Vitamin C (Ascorbic Acid).
Items Details
Item Form: Liquid
Tea Variety: Green
Number of Items: 12
Container Type: Bottle
Caffeine Content Description: Medium Caffeine
Specialty: Antioxidant, Low Calorie, Natural, Organic, Unsweetened
Region of Origin: Asia
Allergen Information: Dairy Free, Gluten Free
Special Ingredients: Green Tea
Product Benefits: Low Calorie, Antioxidant Rich, Healthy Refreshment
Item Type Name: Green Tea
Liquid Contents Description: Coffee & Tea Drinks
Sweetness Description: Unsweetened
Frequently Asked Questions
Will this give me a real energy lift at my desk, or is it just flavored water?
It is actual brewed Japanese green tea, so each bottle delivers a medium caffeine level from real tea leaves. Most office drinkers notice a clean, focused lift around 20 minutes after sipping, without the jittery spike of a double espresso.
Is it okay to drink during long meetings or while on calls?
Yes. There is no brewing, no steeping, and no noisy kettle. You can quietly open a bottle, sip between agenda items, and stay hydrated through back-to-back Zoom calls without disrupting the room.
Can I keep a few bottles at my desk without them going bad?
Unopened bottles are shelf stable and easy to stock in a desk drawer or office fridge. Once opened, keep the bottle refrigerated and finish it within a day or two for the best flavor and freshness.
Will the caffeine cause a crash later in the afternoon?
Green tea contains a moderate amount of caffeine along with L-theanine, an amino acid naturally found in tea that supports steady focus. Most customers report a smoother rise and fall than sugary energy drinks or high-caffeine coffee.
Does it fit in standard car cup holders and laptop bags?
Yes. The 16.9 oz single-serve bottle is shaped to fit most car cup holders, backpack sleeves, and side pockets of work totes, making it a clean commuter choice for traffic-heavy mornings.
Is this a smart swap for my afternoon vending machine soda?
It is one of the easiest productivity upgrades you can make. You keep the cold, can-crack ritual, but skip the sugar crash that tanks your focus at 3 p.m. and replace it with antioxidants and just 5 calories.
Will my coworkers steal these if I bring a case to the office?
Most likely yes, and that is usually a good sign. A case of 12 fits neatly in a shared fridge, and many customers reorder because their team finishes the pack within a week.
Can I drink this before a presentation or interview?
Yes. The moderate caffeine and lack of sugar help you feel alert and clear without the dry-mouth or shaky hands that can come with strong coffee. Sip a small amount 15 to 20 minutes beforehand for best results.
Is it good for late-night study sessions?
It is best used earlier in the evening, since the caffeine, while moderate, can still affect sleep if consumed too close to bedtime. For late-night cramming, we suggest finishing your last bottle at least four hours before you plan to sleep.
Does stocking this save time compared with brewing loose-leaf tea at work?
Dramatically. Brewing loose green tea at the office means a kettle, strainer, mug, and several minutes of steep time. A ready-to-drink bottle lets you stay in your focus flow and get back to work in seconds.
How does this compare with cold brew coffee for productivity?
Cold brew typically delivers more caffeine and a heavier mouthfeel, while Oi Ocha offers a lighter lift with antioxidants and almost no calories. If you want focused energy without the afternoon slump, green tea is often the steadier choice.
Is it better than energy drinks for sustained work focus?
For most people, yes. Energy drinks stack caffeine with high sugar or artificial sweeteners, which can spike and crash your focus. Oi Ocha gives you a moderate, clean lift with no sugar, no artificial additives, and real tea antioxidants.
Will the green tea flavor clash with my lunch at my desk?
The unsweetened, clean profile pairs well with most lunches, especially grain bowls, salads, sandwiches, and Asian-inspired meals. Because there is no added sugar or heavy cream, it does not compete with savory flavors.
Can I drink it before a workout without upsetting my stomach?
Yes. With just 5 calories, zero sugar, and a moderate caffeine level, it is gentle on the stomach for most people. Drink it 20 to 30 minutes before exercise for a light pre-workout lift.
Is this strong enough to replace my morning coffee?
If you currently drink a single cup of light or medium-roast coffee, Oi Ocha can work as a 1:1 swap. For double-shot espresso drinkers, pair your morning bottle with a second cup of green tea or try the Bold variety in the larger size for a deeper brew.
Will coworkers mistake this for plain water and throw it out?
The green tea color and printed label are easy to spot, but if you share a fridge, we recommend writing your name on the cap or keeping a labeled bin. It is a common office problem with any premium bottled drink.
How should I store Oi Ocha before and after opening?
Store unopened bottles in a cool, dry place away from direct sunlight, such as a pantry or cabinet. Once opened, keep the bottle tightly closed in the refrigerator and consume within 24 to 48 hours for the freshest taste.
Do I need to brew or steep this, or is it ready to drink?
It is fully ready to drink. Simply unscrew the cap and enjoy it chilled, or pour it over ice. There is no steeping, straining, or waiting required, which is why it is so popular for offices, commutes, and travel.
Can I drink it hot like traditional Japanese green tea?
It is brewed and packaged as a cold, ready-to-drink tea, but you can warm it gently in a microwave-safe cup or on the stovetop. Avoid boiling it, since high heat can make green tea taste bitter and reduce some of the antioxidant content.
Is the bottle safe to reuse or refill?
The PET bottle is designed for single use and is not intended for long-term reuse, since scratches and wear can harbor bacteria. For refills, decant into a clean glass or stainless steel bottle.
Will it fit in my car cup holder and standard lunch box pockets?
Yes. The 16.9 oz bottle is shaped to fit most car cup holders, side pockets of backpacks, and insulated lunch bags. The 67.6 oz size is wider and better suited to home or office fridges.
What is included in a case when I order it?
A standard case contains twelve 16.9 oz bottles of unsweetened Oi Ocha green tea, sealed and ready to drink. No accessories, mugs, or sweeteners are included, so all you need to enjoy it is a cold fridge and a glass if you wish.
Is this product safe for people with common allergies?
Yes. The formula is gluten-free, dairy-free, and contains no major allergens. It is also free from artificial colors, flavors, and preservatives, making it suitable for most allergy-sensitive households. Always check the label for the most current ingredient information.
Does it need to be refrigerated during shipping?
Unopened bottles are shelf stable and ship safely at ambient temperatures. For the best taste, place them in the refrigerator for a few hours before drinking, since Oi Ocha is designed to be enjoyed cold.
How is bottled green tea different from brewed tea I make at home?
Bottled green tea is brewed in large batches from whole tea leaves, then packaged in a clean, sealed environment so it stays fresh for months. Home-brewed tea is made one cup at a time, with a different water profile, steep time, and freshness window. Oi Ocha gives you the brewed-leaf flavor in a grab-and-go format without the steeping step.
