I may have been ambiguous in my reply. One ounce is 28.3 grams, so near enough to 30 grams. A standard session is 10 grams in 375mls of water = 3 shells, so 1 ounce will give 3 standard sessions. Of course you can up the session to 15grams, but then you will only get 2 sessions for your ounce. Once I get home I will weigh a teaspoon of Quick Kava and edit this reply.
[Edit] According to my digital scales, 1 metric 5ml level teaspoon of Quick Kava is around 1.7 grams. IMHO you would need 6 teaspoons to have a standard session and I would put that into 375 mls of water for 3 shells. It has a mild taste, certainly way more palatable that Borogu.