Koffein
I DS9-avsnittet "... eller striden mot det starka" skapar Quark en koffeinfri -version;
ODO: (re: the drink) What is it?
QUARK: (pleased with himself) The chief asked me to come up with a decaffeinated raktajino for Kira. I'm thinking of marketing it.
All watch as Kira takes a sip from the mug...
WORF: Well...?
KIRA: (grimacing) Ugh... it's awful.
Implikationen (baserat på observation) är att den innehåller mycket av koffein.