How to make your own blended latte's :?

i've worked at both starbucks and biggby, and i know the pumps of flavor they use and the amount of ice and espresso shots and such, but i'm stumped as to how to thicken it. at starbucks, they mix a "coffee base" in with the ice and other ingredients, at biggby they use a "tenacious tonic", but i'm not sure what exactly is in either of them to recreate the drink at home. any help or ideas are appreciated, thank you :)