Iced tea. According to the inquiry of Jinmailang official website, it is known that the iced black tea in Jinmailang series drinks is a yellow bottle cap "one more bottle" promotional product. If you open the bottle cap and see the words "one more bottle" engraved in the bottle cap, you can exchange it for a bottle of the same product with the same specifications at the designated place. Jinmailang is a modern large-scale comprehensive food enterprise group integrating production, sales and research and development.