If you’re in the Peterborough, Ontario area I recommend trying Belly of the Beast kombucha. (Kombucha being, as Wikipedia defines it, “a variety of fermented, lightly effervescent sweetened black or green tea drinks that are commonly intended as functional beverages for their supposed health benefits.” It has an unusual, fermented, yeasty taste, and I really like it.)
The bottles are stubbies, like beer used to come in.
It’s for sale in a few stores, such as Chasing the Cheese, and the tap room is open a couple of days a week, so you could go see where it’s made and get a growler (I haven’t yet).
All the ones I’ve tried are very nicely flavoured without being too strong. None of these are going to blow your head off.