The Rumor Behind Sam's Club China's Sellout Milk Coffee: 'One Bottle Melts Three Jin'

By the time a shopper reaches the aisle, it is usually gone. "Milk Talk," a coffee milk sold only through Sam's Club China, has become the chain's latest sellout phenomenon: shelves emptied in under half an hour after each restock, the app showing "restocking" for days, and members reporting that they visited stores seven or eight times without once finding it. The reason is a rumour. On Chinese social platforms since the summer, the drink has been passed around with a claim no label makes: 喝一瓶瘦三斤 — drink one bottle, lose three jin, about 1.5 kilograms, of body weight.

The product itself is disarmingly simple. It is made for Sam's Club by dairy giant Yili, in 290-millilitre bottles sold eight to a pack for 49.9 yuan, with an ingredient list of exactly two entries: raw milk and coffee concentrate. That is the whole formula — a latte in a bottle, roughly the sugar content of the café drink it replaces, and nothing on the packaging or in any official product description mentions weight loss at all.

Reporters from the Anhui outlet Midu News who called around Sam's stores on September 23 found queues at outlets in several cities and a purchase policy that reads like scarcity management: restocks arrive irregularly, each membership is capped at two packs, and one store reported only a dozen or so packs left by the time they called, selling out in under thirty minutes. Asked directly about the weight-loss claim, a store employee's reply has become the story's deadpan punchline: "There's no such product introduction. It's just a healthy drink."

The gap between those two sentences — a fat-melting elixir on the timeline, a milk-and-coffee drink at the till — is where the story actually lives. Sam's Club's China business runs on precisely this dynamic. Membership retail trades on the promise that the buyer's curation has already sorted the good from the mediocre, and every few months one of its exclusives escapes that frame and becomes a speculative object: snapped up not to drink but because scarcity itself signals value. One shopper's July post shows the rumour was already circulating months ago — "supposedly one bottle melts three jin" — with both it and a cold pizza she coveted perpetually out of stock. The item sat on Baidu's search board this week as queues formed offline, a sign the craze has pushed well past the Weibo bubble.

For Sam's Club the sellout is a strange kind of compliment, arriving at an awkward moment. The chain put an American executive atop its China procurement desk this week — a bet that curation is the moat — and its new chief buyer inherits a bestseller he cannot keep on shelves, sustained by a claim the company itself does not make. Whether a rumour-driven run like this builds loyalty or burns it is the open question; members who fight for a weight-loss drink that is, as the staff would put it, just a healthy drink, may reasonably ask what else the label is not saying.