Teh tarik, a frothy milk tea, is considered the unofficial national drink of Malaysia. The hot, black tea made with sweet condensed milk, is equally popular in neighboring countries like Singapore.

Vietnam officials are investigating the Chinese milk tea brand Chagee, which is set to open its first store in Vietnam, for using images of the so-called “nine-dash line” map on its mobile app, ...

Take, for example, its Smooth King signature drink, which combines Hong Kong-style milk tea made from a 50-year-old recipe with honeycomb, tapioca pearls and a cheese cloud foam. Silk’s new ...