ABSTRACT
The tea drink market has been increasing every year. In Japan, the sale of green tea drinks has consistently grown compared to that of oolong and black tea drinks (gure 17.1).1 The sales growth of green tea drinks has been due not only to the familiarity with green tea from the old days, but also the increase in health-oriented consumers in recent years. The sale of polyethylene terephthalate (PET) bottled drinks is increasing compared to that of canned drinks (gure 17.2),1 because of its lightness, easier carrying after opening the container, and sense of security that is able to protect the contents from the outside.
