So, we've gone from a society that would have put white people on everything, and gotten blasted for it eventually, to one that celebrates/promotes/capitalizes from ethnic diversity, and because you noticed a correlation between the pictures and one incidence of preference(s), you think they are racists? Wrap that up with your implied tea preference stereotype, and this is full of win.
could the company possibly be putting images on each tea that correlate with the place of origin of each particular flavor? green tea originates from china, ceylon is sri lankan, sweet tea from the southern us...etc?