The Verdict

OSULLOC Cold Brew Tea Variation Review: Is This Premium Korean Tea Worth Your Money?

Most cold brew tea products are a gimmick — the same mediocre leaves you could steep hot, just with “cold brew” stamped on the box. OSULLOC’s Cold Brew Tea Variation is different. This South Korean brand, backed by the Amorepacific group (the same people behind Sulwhasoo skincare), actually formulated these blends specifically for cold extraction. After testing all three varieties over several weeks, here’s the honest breakdown.

What’s Actually in the Box

You get 15 pyramid tea sachets total, split across three blends: Cold Brew Green Tea, Cold Brew Barley Tea, and Cold Brew Roasted Tea (a roasted green tea). Each sachet holds 2g of leaf — noticeably more than the standard 1.5g in commercial bags. The pyramid shape gives leaves room to expand, which matters for cold extraction where water moves slowly through the leaf.

As shown in the product image, the box is clean and minimal — typical OSULLOC aesthetic. Inside, each sachet is individually foil-wrapped, which preserves freshness well. One minor gripe: the foil wrappers aren’t labeled individually. The outer sleeve tells you the box contains three varieties, but you won’t know which sachet is which until you open it. If you’re brewing for guests who have preferences, that’s an annoyance.

Performance: Does Cold Brew Actually Work?

Here’s where OSULLOC earns its 4.2-star rating. The recommended method is straightforward: drop one sachet in 500ml of cold water, refrigerate for 2–4 hours. I tested at 2, 3, and 4-hour marks across all three varieties.

Cold Brew Green Tea — The standout. At 3 hours, it produces a pale golden liquor with a gentle, vegetal sweetness and zero bitterness. This is remarkable because green tea steeped hot for even 30 seconds can turn harsh. The cold extraction pulls out amino acids (theumami) while leaving behind the tannins that cause astringency. At 4 hours, it deepens slightly without going bitter.

Cold Brew Roasted Tea — This is a roasted green tea, similar to Japanese hojicha but lighter. It delivers a toasty, nutty profile with a smooth finish. It’s the most forgiving of the three — even at 5+ hours, it doesn’t over-extract. Good option if you tend to forget about your tea.

Cold Brew Barley Tea — The weakest link. Traditional Korean barley tea (boricha) has a deep, almost coffee-like roastiness. This version is lighter and sweeter, more like a mild grain water. It’s pleasant but won’t satisfy anyone who grew up drinking proper boricha. If you’re buying the box primarily for the barley tea, you’ll be disappointed.

What Buyers Consistently Praise

Scrolling through the 210 Amazon ratings, a few themes dominate. One verified buyer wrote: “I’ve tried multiple cold brew tea brands and these are the only ones that don’t taste watered down. The green tea actually has flavor.” Another noted: “Bought these for a summer party and guests kept asking what tea it was. The roasted one is dangerously drinkable.”

The consensus: the green tea and roasted varieties deliver genuine flavor that holds up to dilution with ice. Multiple reviewers also highlighted the quality of the leaf — whole leaves, not dust, which is rare in commercial tea bags.

Where It Falls Short

Beyond the barley tea being mild and the labeling issue, there’s the cost-per-cup factor. At roughly $1 per sachet, this runs 3–4x the cost of standard cold brew tea bags from brands like Lipton or Tazo. You’re paying for OSULLOC’s sourcing and quality — the green tea is from Jeju Island, which is legitimately premium — but budget-conscious shoppers should know what they’re getting into.

Also worth noting: the 4-hour steep time is a commitment. If you want iced tea in 15 minutes, this isn’t the product. Cold brew requires planning ahead.

Who Should Buy This

• Iced tea enthusiasts who want restaurant-quality cold brew without the hassle of loose leaf and strainers
• Green tea drinkers who’ve been burned by bitter hot-steeped varieties and want a smooth alternative
• Gift buyers looking for a premium, shelf-stable present for tea lovers — the box looks genuinely elegant
• Not for anyone expecting traditional strong barley tea, or those who need instant gratification

FAQ

Q: How long should I steep OSULLOC cold brew tea? A: 2–4 hours in the fridge for 500ml of water. The green tea hits its sweet spot at 3 hours; the roasted tea can go longer without turning bitter. Don’t exceed 6 hours — it won’t ruin the tea, but the flavor plateaus.

Q: Can I reuse the sachets? A: Yes, but the second infusion will be noticeably weaker. The pyramid sachets hold up well structurally, so you can get a lighter second batch. I’d recommend using fresh sachets for the best experience.

Q: Is this actually from Jeju Island, Korea? A: OSULLOC sources from their own tea fields on Jeju Island, which is one of the few places in Korea with suitable tea-growing conditions. The packaging indicates the green tea blend uses Jeju-grown leaves. Authentic, not marketing fluff.

The Verdict

Buy it if you want premium cold brew iced tea with genuine flavor depth, and you’re willing to plan 3–4 hours ahead. The green tea variety alone justifies the price.

Skip it if you’re on a tight budget, need quick iced tea, or you’re specifically seeking traditional roasted barley tea flavor.

Rating: 4.2/5 — A quality product with one weak blend and a few minor usability flaws. The green and roasted teas are exceptional; the barley tea drags the average down. For the cold brew green tea experience alone, this is worth it.

Where to Buy

👉 Check Price on Amazon →

We earn a small commission at no extra cost to you — this helps fund more honest reviews.

Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.