Here's a secret: the medium and large sizes at milk tea shops might be a trick. Everyone who’s done it knows: medium 500ml, large 650ml, price difference 5 bucks, cost difference about 0.3 yuan. An extra sip of milk, a little more ice—feels like the large size is a good deal. But actually: they make an extra 4.7 yuan profit from you. Even more sneaky: the medium size is just not enough to drink, and the large size is too much—you’re always stuck in a dilemma. So, either order a medium or bring your own cup. Don’t be fooled by the “good deal.” 💬 Have you ever been tricked? Share in the comments.