My cousin who spent some time in Paraguay did terere the way she learned there. It wasn't fizzy though. It was made in one cup with a steel straw/strainer comb

My cousin who spent some time in Paraguay did terere the way she learned there. It wasn't fizzy though. It was made in one cup with a steel straw/strainer combination, and you'd pour ice cold water on it. Then you'd drink it all (with leaves+strainer the cup didn't hold much), then pass it on to the next person. Everyone drank from the same cup/straw. And you'd use the leaves for many drinks before replacing them. There was a lot of leaves for the amount of liquid. And you wouldn't let it steep at all either. Fill, drink, pass it on, repeat. I really liked it.