KOI Thé is running an Arknights: Endfield collaboration in Singapore from 20 August to 3 September 2026, and unusually for a bubble-tea tie-in, it does not cost anything extra. There is no collab-priced special drink to buy. The merch attaches to a menu section that was already there: the Winter Melon Series.
> Quick view: 1 Winter Melon drink = cup sleeve + dispatch ticket + 1 random transparent card · 2 drinks = double that, plus a chibi sticker OR a paper coaster · 2 drinks + an #ENDFIELDxKOI post = an acrylic standee · all designated KOI Thé and KOI Thé Express stores · 20 Aug to 3 Sep 2026 · designs random, no exchanges, while stocks last.
What you get, exactly
Straight off KOI's own redemption poster:
Campaign 01, any 1 Winter Melon Series drink
- Collaboration Cup Sleeve x1
- Dispatch Ticket x1
- Transparent Card x1 (4 designs available, distributed randomly)
Campaign 02, any 2 Winter Melon Series drinks
- Collaboration Cup Sleeves x2
- Dispatch Tickets x2
- Transparent Cards x2 (4 designs available, distributed randomly)
- Choice of: Chibi Sticker x1 OR Paper Coaster x1 (4 designs available, distributed randomly)
Plus, on the same 2 drinks: post them on Instagram, TikTok, Facebook or RED (Xiaohongshu) with #ENDFIELDxKOI and the store adds a Character Acrylic Standee x1, in four designs: Arcane, Zhuang Fangyi, Frossi and Camille.
That last line is the part worth reading twice. The standee is not a third tier needing another two cups. It rides on the same two-drink purchase, so two drinks and one social post is the ceiling of this campaign.
The cheapest cup is the correct cup
The Winter Melon Series is four drinks, and that is the whole eligible list:
| Winter Melon Series drink | M | L |
|---|---|---|
| Winter Melon Tea | $5.30 | $6.30 |
| Winter Melon Green Tea | $5.30 | $6.30 |
| Winter Melon Milk Tea | $6.00 | $7.00 |
| Winter Melon Lemon Juice | $6.00 | $7.00 |
Prices read off foodpanda on 26 August 2026 and cross-checked at four outlets (KOI Thé Nex, KOI Thé 18 Tai Seng, KOI Thé Sun Plaza and KOI Thé Express myVillage), all four identical. These are delivery-menu prices, which normally sit above counter prices, so read them as a ceiling.
Because the merch does not change with the drink, the $1.40 gap across the two-drink tier buys nothing extra: $10.60 with two M teas, $12.00 with two M milk teas, same sleeve, same tickets, same cards, same choice of sticker or coaster. If you were going to order a Winter Melon Milk Tea anyway, order it. If you are here for the merch, the plain Winter Melon Tea does the identical job for $1.40 less across two cups.
The fine print
- Designs are random and cannot be exchanged. KOI prints this against the transparent card and the coaster specifically. You do not get to pick your character.
- Availability differs by outlet. KOI's own wording is that designs are distributed by outlet, so the four designs are not evenly spread across the island.
- While stocks last. Eight days remain as of Wednesday 26 August, but a two-week anime collaboration in Singapore usually empties the busy malls well before the printed end date. Go on a weekday, and go early.
- "All designated KOI Thé stores across Singapore". Designated, not all. If you are making a special trip to one outlet, call it first.
- The poster says nothing about delivery. Redemption is framed as an in-store handover of physical merchandise, so buy in person if the merch is the point.
The Suntec event has already happened
KOI ran a KOI Thé x Arknights: Endfield weekend event at Suntec City on 23 August, with official cosplayers, photo installations, quizzes and merchandise prizes, and it was a single-day thing. It is over. Several deal write-ups still carry it as though it runs alongside the drink campaign, so if that was your reason to head down this week, there is nothing there. What remains, and what is still worth the trip, is the counter redemption at any participating store.
Is a full set realistic?
Not on a normal budget. One drink earns one transparent card, four designs, randomly given. Getting all four is the classic coupon-collector problem, and the average number of draws needed for four items is about 8.3, with unlucky runs going past ten. At $5.30 an M Winter Melon Tea that is roughly $44 of bubble tea in eight days for four cards, and the chibi sticker and coaster are worse still because they come one per two drinks.
The sane version: buy the drinks you would drink anyway, take the cards you get, and trade duplicates. Singapore's Arknights community runs active trade threads and the campaign ends the same day for everyone, which makes the last weekend the natural swap window.
Related
- Best Bubble Tea Deals in Singapore the running list of live BBT promos
- Best Bubble Tea Brands in Singapore where KOI sits against the rest
- ChaPanda's 1-for-1 soybean cheese-foam oolong milk tea the other bubble tea deal running now
- Best Singapore Promos & Deals This Month the full urgency-sorted roundup
*Campaign period, redemption tiers and terms verified against KOI Thé Singapore's own Facebook and Instagram posts (facebook.com/koithesingapore, 20 to 25 August 2026). Winter Melon Series prices read off foodpanda's live KOI Thé menus on 26 August 2026. Dates, items, prices and stock are set by the brand and can change, so confirm at the counter before you commit. Cover image: the official Arknights: Endfield x KOI Thé collaboration key visual from KOI Thé Singapore's announcement (© Gryphline).*
