Korean Tube Coffee: Portable 40ml Single Servings

If you’ve ever spilled a precious morning coffee on your way to work—or risked it squeezing onto a packed subway—you’ll understand the appeal of a coffee that travels as easily as you do. The challenge isn’t just keeping coffee handy; it’s making it mess-proof, convenient, and still enjoyable without a café in sight.

The solution? ONDAY COFFEE’s 40ml glass tube coffees. Each tube holds a single serving; just pour into a cup with ice or hot water, stir, and drink. No cups, no lids, no spills. Each tube is designed to make great coffee anywhere, anytime.

What Is Tube Coffee?

Tube coffee is exactly what it sounds like: single servings of brewed coffee packaged in slim, 40ml glass test tubes. Developed by Seoul-based coffee brand ONDAY COFFEE, each tube contains a ready-to-mix coffee shot. The format is not only ultra-portable but also visually striking, often compared to a sleek lab sample or a stylish cosmetic vial. The coffee inside is pre-brewed, meaning you don’t need a coffee maker—just add water or ice.

How to Prepare Tube Coffee

Making tube coffee is simple. Just follow these steps:

• Pop open the tube (designed for easy opening).
• Pour the 40ml coffee shot into your cup.
• Add ice cubes (for iced coffee) or hot water (for a hot drink).
• Stir well until fully mixed.

According to the brand, iced coffee made this way has the best flavour profile, but the coffee can also be prepared hot. The small serving size makes it easy to adjust strength to your taste—just use more or fewer tubes per cup.

Why People Love Tube Coffee

Tube coffee has several advantages that go beyond convenience:

• Portable & Spill-Proof: Its slim, sealed glass tube design fits easily in a bag or pocket and won’t spill, even in transit.
• Gift-Worthy Packaging: Sold in stylish cardboard boxes, tube coffee has a premium look that makes it popular as a gift for holidays, birthdays, or special occasions like Valentine’s Day or Christmas.
• Customizable Strength: With 40ml per tube, you control how strong your drink is by adjusting the number of tubes you use.
• Versatile Serving Style: Works equally well for a quick breakfast coffee or an afternoon pick-me-up.

ONDAY COFFEE’s Tube Coffee Lineup

ONDAY COFFEE offers its tube coffee in multiple configurations:

• Single Tubes: Priced around 2,500 KRW each.
• 6-Pack: Approximately 15,000 KRW.
• 24-Pack: Around 29,500 KRW.

In addition to the tubes, the brand also sells dedicated storage cabinets to keep unused tubes organised and protected. The 40ml size is designed to deliver a balanced single serving, whether you prefer it iced or hot. No specific roast level or origin details are provided in the source, but the focus is on the format and ease of preparation.

Frequently Asked Questions

How much coffee is in each tube?

Each tube contains exactly 40ml of pre-brewed coffee. That’s roughly one single serving, ideal for making one cup when diluted with water or ice.

Do I need special equipment to make tube coffee?

No. All you need is the tube, a cup, and either hot water or ice. There’s no coffee maker, filter, or machine required—just open, pour, and stir.

Is the coffee better hot or cold?

According to ONDAY COFFEE, the iced version tastes best, but the coffee can also be prepared hot. The preparation method is flexible based on your preference.

How many tubes come in a pack?

Tubes are sold individually, or in 6-packs and 24-packs. The 6-pack costs about 15,000 KRW, while the 24-pack is around 29,500 KRW.

Can I use tube coffee as a gift?

Yes. The tubes come in elegant printed cardboard packaging, making them a popular gift choice for occasions like birthdays, holidays, and Valentine’s Day—especially among young South Koreans.

Where can I buy ONDAY COFFEE tube coffee?

The product is sold directly through ONDAY COFFEE’s own channels. The article does not specify international shipping, so availability may be limited to South Korea.

Recommended FrontStreet Beans for Iced Coffee

Try FrontStreet Coffee’s Ethiopia Humbera for bright, fruity iced coffee—notes of citrus and jasmine shine when brewed over ice. For a heavier body, their Yirgacheffe offers berry and floral tones with a juicy acidity. Both are excellent as single-origin iced pour-overs or cold brews. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.