Black Tea for Bubble Tea Wholesale: Vietnam Sourcing Guide

A good black tea for bubble tea wholesale is a strong, bright CTC or broken-leaf black tea that keeps its colour and tea character after milk, sugar and ice go in. Vietnam is an established origin for this kind of base: Taiwan customs data show that Vietnam shipped more black tea to Taiwan by volume in 2024 than any other origin. Chains should buy against a written specification, test samples in their own recipe and lock a reference sample before the first full order. TRAVINA supplies Nui Coc black tea (hong tra) from Thai Nguyen, an orthodox whole-leaf rolled black tea, and quotes on request.

Decision	What to check
Leaf style	CTC or broken orthodox grades for fast, dark extraction; whole leaf mainly for straight or iced tea
Specification	Grade name, ISO 3720 chemical limits, production date, residue test for your own market
Sample test	ISO 3103 cupping first, then your store recipe, hot and iced
Packaging	Sealed, light-proof bags sized to what one store uses after opening
Storage	Cool, dry, dark, away from strong odours; first in, first out
Ordering	Stock item or custom packing; deposit, MOQ and lead time agreed in writing

Why bubble tea buyers look at Vietnamese black tea

According to the Import-Export Department of Vietnam’s Ministry of Industry and Trade, citing Taiwan customs data, Taiwan imported 18,700 tonnes of black tea in 2024, and 7,970 tonnes of it came from Vietnam, more than from any other supplier. Taiwan is where bubble tea began, and Taiwanese researchers have described how local demand moved from loose oolong towards tea bags and bubble milk tea from the 1990s, which pushed the industry to rely on imported leaf.

A pack of TRAVINA Nui Coc black tea beside a dish of twisted dry black tea leaves — Nui Coc black tea is an orthodox leaf made in limited lots; chains should brew a sample with their own milk base before ordering.

The trade has continued in 2026. In January to May 2026, Vietnam exported 4,800 tonnes of tea to Taiwan worth US$9.2 million, at an average of US$1,912 per tonne, up 12.1% year on year. Across all markets, Vietnam exported 77,250 tonnes of tea worth US$143.48 million in the first eight months of 2026.

For a chain, the real questions are therefore grade, consistency and paperwork. Taiwan, for example, requires chain beverage shops, convenience stores and fast-food operators to disclose the country of origin of the tea used in drinks prepared on site, together with total sugar, calories and caffeine.

Which black tea works as a milk tea base

Milk, sugar and ice dilute and soften tea, so the base needs body, colour and enough astringency to stay recognisable:

CTC (crush, tear, curl): withered leaf passes through toothed rollers and comes out as small, hard pellets. CTC gives a dark liquor quickly, which is why it suits tea bags and high-volume brewing. The trade-off is a more uniform, generic flavour.
Orthodox (OTD) broken grades: the leaf is rolled, then broken and sorted into grades such as BOP or FBOP. Orthodox grades look clearly different from one another and keep more of the leaf’s own character, which shows through in lighter milk teas and fruit teas.
Whole-leaf orthodox: grades such as OP are usually a better fit for straight black tea or iced tea than for heavy milk drinks.

Many chains end up with a blend: a CTC or small broken grade for colour and strength, plus an orthodox broken grade for aroma. Vietnam’s earlier loose black tea standard, TCVN 1454:1993, listed the orthodox grades OP, FBOP, P, PS, BPS, F and D, and the CTC grades BOP, BP, OF, PF and D, so Vietnamese suppliers will recognise these terms.

Specifications to put in your purchase contract

Origin and processing: province of origin, CTC or orthodox, and the exact grade name.
Chemical limits: ISO 3720:2011, adopted in Vietnam as TCVN 1454:2013, sets water extract of at least 32%, total ash of 4–8%, water-soluble ash of at least 45% of total ash, alkalinity of water-soluble ash of 1.0–3.0% (as KOH) and crude fibre of no more than 16.5%, on a dry-matter basis. Ask for a laboratory report against these figures.
Residue testing: test against the maximum residue limits of your own market, not the origin’s. In a 2015 inspection of chain drink shops, Taiwan’s health authorities found pesticide residues above permitted levels in 35 of the 316 tea samples tested at that point.
Traceability: production date, lot number and shelf life printed on every bag and carton.
Packaging: inner liner, outer carton and a net weight per bag that one store can finish soon after opening.

How to test samples before you commit

Request two or three candidate grades from each supplier, with lot numbers.
Cup them side by side using the ISO 3103 method: 2 g of tea per 100 ml of freshly boiled water, infused for 6 minutes for black tea in a standard white pot.
Brew each candidate with your own store recipe, water, milk or creamer and sweetness level. Make it hot and iced, and taste again at the end of your normal holding time.
Check colour after milk, astringency after ice dilution and aroma once sweetened.
Choose, then seal and label a reference sample. Before each shipment, ask for a pre-shipment sample from the actual lot and compare it with the reference.

Storage at the warehouse and in store

Dry tea picks up moisture and odours easily, and its aroma fades with heat and light. A 2024 study in the journal Beverages notes that storing tea in sealed packaging in cool, dark conditions can extend its shelf life. In practice:

Keep unopened bags sealed, off the floor and away from walls, spices, coffee and cleaning products.
Rotate stock first in, first out by production date, not by arrival date.
Choose bag sizes each store finishes soon after opening, and reseal opened bags tightly.
Treat brewed tea base as a food safety item and follow your local regulator’s rules on holding time.

MOQ, deposits and lead times

MOQs vary by supplier and depend on whether you buy a stock item or ask for custom packing. Stock tea in standard bags can usually be ordered in smaller lots, while private label adds printing minimums for bags and cartons. Ask every supplier to state the MOQ per grade, per packing format and per label design, and to confirm lead times in writing.

TRAVINA’s terms are simple. Stock items need no deposit. OEM and private label orders from VND 20,000,000 carry a 20–30% deposit, and any order with logo printing carries a 50% deposit. An order under 100 kg ships from our warehouse within 24 hours. Our raw material comes from 40.5 ha of tea grown under VietGAP procedures in Dai Tu, Thai Nguyen, and our La Bang processing facility is ISO 22000 certified. For Nui Coc black tea, send us your drink style and expected monthly volume and we will prepare a quotation.

Building a milk tea base for your stores? Importers can request samples of Traditional Northern Green Tea, Special Green Tea or Broken Needle Tea Bags through our Contact page, or message our export team on Zalo/WhatsApp at +84 855 318 678. Samples of Nui Coc black tea for milk tea trials can be added to the same request.

FAQ

Is CTC or orthodox black tea better for bubble tea?

CTC gives colour and strength quickly and suits high-volume brewing, while orthodox broken grades keep more aroma. Many chains blend the two, so test both in your own recipe before deciding.

Can green tea from Thai Nguyen be used in milk tea?

Yes, green tea is used in green milk tea and fruit tea menus. Test it the same way as black tea, in your recipe and at your holding time; for Traditional Northern Green Tea served plain, we suggest 5–7 g per 200 ml at 80–85°C.

How much tea should a chain order per store?

Multiply your daily cups by the grams of leaf in your recipe, then pick a bag size that each store finishes soon after opening.

What documents should I ask for with a shipment?

Ask for a commercial invoice, packing list, certificate of origin and laboratory reports that match your market’s rules. Check with your customs broker which documents your country requires for tea.