At work, I was recently on one of the coffee-fetching breaks. Well, I actually fetched my trusty herbal tea. Then we met another guy at the coffee machine and they all started talking about how much coffee they drank. Eventually, they came to the conclusion that they were all addicted, because they had kids. And I just stood there with my trusty herbal tea, like yep, I don’t have kids.
Apparently, the name is derived from “jetstream”, so it probably is supposed to be pronounced like cheddar. But a German who does not know that would probably pronounce it as Yetta, yes.