well, i've never had theirs, but i would suggest buying a box of black chai tea (although green chai is also available) and following the instructions for making traditional chai on the box (basically you simmer the teabags in milk). add a little sweetener of your choice, and enjoy hot/pour over ice/blend with ice for a smoothie.
my personal favorite chai is from
Stash Tea. it is sold in about half of my local grocery stores $3 for a box of 20 bags in the tea section, but if you like it you can order it from their website 120 bags for $17.25 or 240 for $31.25.