Usually when companies like Coke and Pepsi venture in new demographics, they plan a gestation period of 15-20 years...i.e. ready to incur losses. They feel, when they start up in a nation they should ween the children / babies onto their product. By the time they grow up and are adults they are pretty much hooked and it is like second nature. And of course they will teach their own offspring to be the same. It becomes part of life and a concept not cross-questioned.
If you compare people who were born before say...1980 and then 1980-85 and people born after that, they habits are easy to tell apart. When these MNCs actually set foot and how old individuals were in these brackets. Nothing bad in this, but is shows an excellent study for societal engineering with such a large span and scope....!