Herbal teas are a whole other topic in and of themselves. Some herbal teas, including hibiscus tea, have a very high vitamin C content. Fruit herbal teas containing whole dried berries can contain vitamin C as well, although much less than fresh fruit.
The Harp, Boston. The Harp is located near TD Garden and Haymarket Square. It's a popular watering hole in downtown Boston and you can find excellent parking nearby at any of the locations on the SP+ map.
If you're going to an event at TD Garden, the North Station Garage will be your most convenient option, if not the cheapest. The MBTA owns this garage, but recently leased it for 75 years to the Bruins. Look for the addition of retail shops and a second entrance/exit onto Legends Way and Causeway Street in a few years.