I drink it now and again. I brought back the bombilla and cup from Chile, back in 1997; they must be kicking about in the house somewhere, but I can't find them, so if I get yerba baté nowadays, I either buy it in bags, just like tea bags, or I prepare it from loose leaves in a
Bodum filter pot.
The grocer in my town stocks the loose leaves, and the big "gastronomic" shop near my work stocks the bags. i think I've had
Nobleza gaucha, Amanda and Taragui brands, and don't remember any being noticeably better than another.
If you search on-line, you'll find plenty of stockists.
It's a nice change from tea, that in any case I only drink when I'm off-colour with a cold or a cough, like right now...
In the US, I had several big Korean shops nearby. The Koreans have a lot of drinks based around ginger or ginseng, often with honey. I think there are some with cedar pollen, too. Sometimes, when I've got a bad cold, I make up a drink by slicing a fresh, juicy piece of ginger root really thinly on the mandolin, putting this in a glass with boiling water, honey, lemon juice and a couple of teaspoons of chilli flakes.
Over here in France, there are loads of different kinds of "tisane"; dried leaves, flowers, fruits, even stems (cherry stalks, for example), and a few roots. You can find a few industrial brands in every supermarket, and find small shop selling loose from jars in most small to medium-sized towns. The last two that I bought were linden and hop flower.
Each variety is supposed to have some kind of medicinal property. There might be some truth to some of them, but I think you need to really believe
really strongly in some of the claims to notice any benefit...